/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:50:25,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:50:25,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:50:25,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 21:50:25,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 21:50:25,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 21:50:25,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 21:50:25,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 21:50:25,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 21:50:25,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 21:50:25,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 21:50:25,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-12 21:50:25,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 21:50:25,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 21:50:25,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 21:50:25,981 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 [2021-06-12 21:50:26,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:50:26,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:50:26,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:50:26,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:50:26,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:50:26,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:50:26,011 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:50:26,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:50:26,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:50:26,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:50:26,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:50:26,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:50:26,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:50:26,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:50:26,014 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:50:26,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:50:26,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:50:26,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:50:26,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:50:26,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:50:26,248 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:50:26,250 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:50:26,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2021-06-12 21:50:26,251 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2021-06-12 21:50:26,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:50:26,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:50:26,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:50:26,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:50:26,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:50:26,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:50:26,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:50:26,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:50:26,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:50:26,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/1) ... [2021-06-12 21:50:26,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:50:26,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:50:26,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:50:26,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:50:26,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (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 [2021-06-12 21:50:26,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:50:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:50:26,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:50:26,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:50:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:50:26,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:50:26,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:50:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:50:26,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:50:26,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:50:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:50:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:50:26,365 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:50:26,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:50:26,578 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:50:26,579 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:50:26 BoogieIcfgContainer [2021-06-12 21:50:26,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:50:26,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:50:26,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:50:26,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:50:26,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:50:26" (1/2) ... [2021-06-12 21:50:26,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35550ac9 and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:50:26, skipping insertion in model container [2021-06-12 21:50:26,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:50:26" (2/2) ... [2021-06-12 21:50:26,585 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2021-06-12 21:50:26,588 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:50:26,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:50:26,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:50:26,589 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:50:26,663 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:50:26,677 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:50:26,706 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:50:26,707 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:50:26,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:50:26,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:50:26,707 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:50:26,707 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:50:26,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:50:26,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:50:26,713 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 21:50:26,741 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:50:26,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:26,753 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:26,753 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 952922745, now seen corresponding path program 1 times [2021-06-12 21:50:26,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:26,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801282180] [2021-06-12 21:50:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:26,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:26,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801282180] [2021-06-12 21:50:26,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801282180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:50:26,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:50:26,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:50:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705875401] [2021-06-12 21:50:26,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:50:26,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:50:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:50:26,883 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:26,904 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-12 21:50:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:50:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:50:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:26,913 INFO L225 Difference]: With dead ends: 217 [2021-06-12 21:50:26,913 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 21:50:26,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:50:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 21:50:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-12 21:50:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-12 21:50:26,948 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-12 21:50:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:26,949 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-12 21:50:26,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-12 21:50:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:50:26,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:26,951 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:26,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:50:26,951 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-06-12 21:50:26,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:26,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403113102] [2021-06-12 21:50:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:26,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:26,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403113102] [2021-06-12 21:50:26,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403113102] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:50:26,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:50:26,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:50:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438866793] [2021-06-12 21:50:26,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:50:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:50:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:50:26,998 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:27,025 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-12 21:50:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:50:27,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:50:27,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:27,027 INFO L225 Difference]: With dead ends: 158 [2021-06-12 21:50:27,027 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 21:50:27,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:50:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 21:50:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-12 21:50:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 21:50:27,040 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-12 21:50:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:27,040 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 21:50:27,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 21:50:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:50:27,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:27,042 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:27,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:50:27,042 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash 5118359, now seen corresponding path program 1 times [2021-06-12 21:50:27,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:27,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658418972] [2021-06-12 21:50:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:27,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:27,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658418972] [2021-06-12 21:50:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658418972] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:50:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:50:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:50:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957250827] [2021-06-12 21:50:27,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:50:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:50:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:50:27,091 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:27,129 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-12 21:50:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:50:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:50:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:27,136 INFO L225 Difference]: With dead ends: 183 [2021-06-12 21:50:27,136 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 21:50:27,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:50:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 21:50:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-12 21:50:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 21:50:27,149 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 21:50:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:27,149 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 21:50:27,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 21:50:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:50:27,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:27,150 INFO L472 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] [2021-06-12 21:50:27,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:50:27,151 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-06-12 21:50:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:27,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362711052] [2021-06-12 21:50:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:27,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:27,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362711052] [2021-06-12 21:50:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362711052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463931876] [2021-06-12 21:50:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:50:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:27,676 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 23 treesize of output 19 [2021-06-12 21:50:27,680 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:27,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:27,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:27,689 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 19 treesize of output 15 [2021-06-12 21:50:27,693 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:27,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:27,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 21:50:27,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:27,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:27,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:27,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-12 21:50:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:27,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463931876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:27,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:27,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:27,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309736246] [2021-06-12 21:50:27,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:27,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:27,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:27,744 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:27,943 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-12 21:50:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:50:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:50:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:27,946 INFO L225 Difference]: With dead ends: 330 [2021-06-12 21:50:27,946 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 21:50:27,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:50:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 21:50:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-12 21:50:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 21:50:27,962 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 21:50:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:27,963 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 21:50:27,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 21:50:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:50:27,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:27,964 INFO L472 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] [2021-06-12 21:50:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:28,185 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-06-12 21:50:28,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:28,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941672461] [2021-06-12 21:50:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:28,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941672461] [2021-06-12 21:50:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941672461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213527317] [2021-06-12 21:50:28,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:28,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:28,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:50:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:28,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-12 21:50:28,596 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:28,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,620 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 19 treesize of output 23 [2021-06-12 21:50:28,644 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:28,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 21:50:28,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:50:28,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:28,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:28,711 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-12 21:50:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213527317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:28,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 21:50:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835862258] [2021-06-12 21:50:28,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:28,757 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:29,079 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 21:50:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:50:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:50:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:29,081 INFO L225 Difference]: With dead ends: 374 [2021-06-12 21:50:29,081 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 21:50:29,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:50:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 21:50:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 21:50:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 21:50:29,099 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 21:50:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:29,099 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 21:50:29,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 21:50:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:50:29,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:29,105 INFO L472 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] [2021-06-12 21:50:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:29,321 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-06-12 21:50:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:29,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055459104] [2021-06-12 21:50:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:29,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055459104] [2021-06-12 21:50:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055459104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944652668] [2021-06-12 21:50:29,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:29,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:50:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:50:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:29,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 21:50:29,558 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:29,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:29,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 21:50:29,569 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:29,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:29,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 21:50:29,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:29,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:29,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:29,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-12 21:50:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:29,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944652668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:29,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:29,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:50:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186031927] [2021-06-12 21:50:29,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:29,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:29,610 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:29,757 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-12 21:50:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:50:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:50:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:29,759 INFO L225 Difference]: With dead ends: 363 [2021-06-12 21:50:29,759 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 21:50:29,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:50:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 21:50:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-12 21:50:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 21:50:29,765 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 21:50:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:29,765 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 21:50:29,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 21:50:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:50:29,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:29,767 INFO L472 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] [2021-06-12 21:50:29,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:50:29,981 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:29,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-06-12 21:50:29,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:29,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253720590] [2021-06-12 21:50:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:30,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253720590] [2021-06-12 21:50:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253720590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617176102] [2021-06-12 21:50:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:30,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:30,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:30,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:50:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:30,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,221 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 23 treesize of output 27 [2021-06-12 21:50:30,251 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:30,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,267 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 19 treesize of output 23 [2021-06-12 21:50:30,299 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:30,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 21:50:30,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:50:30,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:30,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:30,365 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:34, output treesize:19 [2021-06-12 21:50:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:30,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617176102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:30,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:30,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979069943] [2021-06-12 21:50:30,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:30,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:30,410 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:30,582 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-12 21:50:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:50:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:50:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:30,584 INFO L225 Difference]: With dead ends: 425 [2021-06-12 21:50:30,584 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 21:50:30,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:50:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 21:50:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-12 21:50:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 21:50:30,590 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 21:50:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:30,590 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 21:50:30,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 21:50:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:30,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:30,591 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:30,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:30,805 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-06-12 21:50:30,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:30,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323999388] [2021-06-12 21:50:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:30,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323999388] [2021-06-12 21:50:30,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323999388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492939973] [2021-06-12 21:50:30,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:30,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:30,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:30,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492939973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:30,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:30,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:30,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383951666] [2021-06-12 21:50:30,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:30,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:30,979 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:31,360 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 21:50:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:50:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:31,363 INFO L225 Difference]: With dead ends: 619 [2021-06-12 21:50:31,363 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 21:50:31,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:50:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 21:50:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 21:50:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 21:50:31,370 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 21:50:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:31,370 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 21:50:31,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 21:50:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:31,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:31,372 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:31,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:31,591 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-06-12 21:50:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:31,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434765310] [2021-06-12 21:50:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:31,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:31,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434765310] [2021-06-12 21:50:31,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434765310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:31,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962766274] [2021-06-12 21:50:31,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:31,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:31,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962766274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:31,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:31,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423126860] [2021-06-12 21:50:31,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:31,735 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:32,479 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 21:50:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:50:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:32,483 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 21:50:32,483 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 21:50:32,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:50:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 21:50:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 21:50:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 21:50:32,494 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 21:50:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:32,494 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 21:50:32,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 21:50:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:32,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:32,495 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:32,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:32,712 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-06-12 21:50:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:32,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949455058] [2021-06-12 21:50:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:32,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:32,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949455058] [2021-06-12 21:50:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949455058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:32,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179964654] [2021-06-12 21:50:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179964654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:32,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601792862] [2021-06-12 21:50:32,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:32,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:32,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:32,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:32,862 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:33,501 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 21:50:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:50:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:33,505 INFO L225 Difference]: With dead ends: 951 [2021-06-12 21:50:33,505 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 21:50:33,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:50:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 21:50:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 21:50:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 21:50:33,515 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 21:50:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:33,515 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 21:50:33,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 21:50:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:33,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:33,516 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:33,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:33,725 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-06-12 21:50:33,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:33,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260094360] [2021-06-12 21:50:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:33,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260094360] [2021-06-12 21:50:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260094360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894580489] [2021-06-12 21:50:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:50:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894580489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:50:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683447105] [2021-06-12 21:50:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:50:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:50:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:50:33,843 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:33,946 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 21:50:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:50:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:33,949 INFO L225 Difference]: With dead ends: 669 [2021-06-12 21:50:33,949 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 21:50:33,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 21:50:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 21:50:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 21:50:33,957 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 21:50:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:33,958 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 21:50:33,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 21:50:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:33,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:33,959 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:34,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 21:50:34,173 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-06-12 21:50:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:34,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233432066] [2021-06-12 21:50:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:34,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:34,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233432066] [2021-06-12 21:50:34,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233432066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:34,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258637377] [2021-06-12 21:50:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:34,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:34,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258637377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:34,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:34,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:50:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161382885] [2021-06-12 21:50:34,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:34,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:34,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:34,356 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:34,506 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 21:50:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:50:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:34,514 INFO L225 Difference]: With dead ends: 710 [2021-06-12 21:50:34,514 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 21:50:34,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:50:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 21:50:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 21:50:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 21:50:34,524 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 21:50:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:34,524 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 21:50:34,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 21:50:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:34,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:34,525 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:34,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:34,741 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-06-12 21:50:34,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:34,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555267060] [2021-06-12 21:50:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:34,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:34,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555267060] [2021-06-12 21:50:34,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555267060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:34,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596201366] [2021-06-12 21:50:34,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:50:34,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:50:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:34,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596201366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:34,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:34,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:50:34,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843490906] [2021-06-12 21:50:34,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:50:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:50:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:50:34,853 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:34,938 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 21:50:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:50:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:34,942 INFO L225 Difference]: With dead ends: 830 [2021-06-12 21:50:34,942 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 21:50:34,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 21:50:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 21:50:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 21:50:34,972 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 21:50:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:34,972 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 21:50:34,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 21:50:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:34,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:34,973 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:35,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:35,189 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-06-12 21:50:35,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:35,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114990274] [2021-06-12 21:50:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:35,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:35,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114990274] [2021-06-12 21:50:35,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114990274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:35,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286888831] [2021-06-12 21:50:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:35,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:35,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:35,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286888831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:35,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:35,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773322515] [2021-06-12 21:50:35,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:35,309 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:35,589 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 21:50:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:50:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:35,594 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 21:50:35,594 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 21:50:35,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:50:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 21:50:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 21:50:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 21:50:35,608 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 21:50:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:35,609 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 21:50:35,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 21:50:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:35,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:35,610 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:35,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 21:50:35,825 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-06-12 21:50:35,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:35,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993212913] [2021-06-12 21:50:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:35,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:35,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993212913] [2021-06-12 21:50:35,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993212913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:35,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354831324] [2021-06-12 21:50:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:35,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:35,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:35,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354831324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:35,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:35,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931842580] [2021-06-12 21:50:35,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:35,958 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:36,334 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 21:50:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:50:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:36,339 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 21:50:36,339 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 21:50:36,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:50:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 21:50:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 21:50:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 21:50:36,355 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 21:50:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:36,355 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 21:50:36,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 21:50:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:36,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:36,356 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:36,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:50:36,575 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-06-12 21:50:36,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:36,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138474902] [2021-06-12 21:50:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:36,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138474902] [2021-06-12 21:50:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138474902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162223074] [2021-06-12 21:50:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:36,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:36,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162223074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:36,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:36,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:50:36,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275166439] [2021-06-12 21:50:36,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:36,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:36,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:36,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:36,708 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:36,964 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 21:50:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:50:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:36,985 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 21:50:36,985 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 21:50:36,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:50:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 21:50:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 21:50:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 21:50:37,024 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 21:50:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 21:50:37,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 21:50:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:37,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:37,026 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:37,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 21:50:37,243 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-06-12 21:50:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:37,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151748110] [2021-06-12 21:50:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:37,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:37,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151748110] [2021-06-12 21:50:37,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151748110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:37,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291736065] [2021-06-12 21:50:37,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:37,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:37,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:37,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291736065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:37,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:37,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:50:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927617770] [2021-06-12 21:50:37,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:37,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:37,366 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:37,581 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 21:50:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:50:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:37,586 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 21:50:37,586 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 21:50:37,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:50:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 21:50:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 21:50:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 21:50:37,600 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 21:50:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:37,600 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 21:50:37,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 21:50:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:37,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:37,602 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:37,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:37,818 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-06-12 21:50:37,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:37,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763156344] [2021-06-12 21:50:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:37,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763156344] [2021-06-12 21:50:37,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763156344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:37,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603026739] [2021-06-12 21:50:37,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603026739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:37,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:37,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:37,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215155362] [2021-06-12 21:50:37,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:37,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:37,918 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:38,225 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 21:50:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:50:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:38,231 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 21:50:38,231 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 21:50:38,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:50:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 21:50:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 21:50:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 21:50:38,247 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 21:50:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:38,247 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 21:50:38,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 21:50:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:38,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:38,249 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:38,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:38,466 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:38,466 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-06-12 21:50:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:38,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216382229] [2021-06-12 21:50:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:38,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216382229] [2021-06-12 21:50:38,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216382229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:38,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985515281] [2021-06-12 21:50:38,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:38,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:38,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:38,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985515281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:38,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:38,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:38,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731030801] [2021-06-12 21:50:38,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:38,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:38,590 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:39,280 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 21:50:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:50:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:39,301 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 21:50:39,302 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 21:50:39,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:50:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 21:50:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 21:50:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 21:50:39,330 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 21:50:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:39,330 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 21:50:39,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 21:50:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:39,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:39,332 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:39,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:39,544 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-06-12 21:50:39,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:39,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614301277] [2021-06-12 21:50:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:39,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614301277] [2021-06-12 21:50:39,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614301277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634619407] [2021-06-12 21:50:39,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:39,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:39,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634619407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:39,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:39,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:39,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224901200] [2021-06-12 21:50:39,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:39,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:39,701 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:40,382 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 21:50:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:50:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:40,387 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 21:50:40,387 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 21:50:40,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:50:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 21:50:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 21:50:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 21:50:40,411 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 21:50:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:40,411 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 21:50:40,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 21:50:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:40,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:40,413 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:40,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 21:50:40,629 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-06-12 21:50:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018817351] [2021-06-12 21:50:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:40,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:40,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018817351] [2021-06-12 21:50:40,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018817351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:40,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038337755] [2021-06-12 21:50:40,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:40,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:40,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038337755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:40,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:40,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:40,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620045913] [2021-06-12 21:50:40,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:40,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:40,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:40,768 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:41,342 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 21:50:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:50:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:41,346 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 21:50:41,346 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 21:50:41,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:50:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 21:50:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 21:50:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 21:50:41,368 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 21:50:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:41,368 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 21:50:41,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 21:50:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:41,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:41,370 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:41,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 21:50:41,572 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-06-12 21:50:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:41,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939392104] [2021-06-12 21:50:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:41,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939392104] [2021-06-12 21:50:41,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939392104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566554562] [2021-06-12 21:50:41,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:41,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:50:41,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:41,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566554562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:41,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:41,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:41,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898871005] [2021-06-12 21:50:41,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:41,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:41,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:41,689 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:42,190 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 21:50:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:50:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:42,195 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 21:50:42,195 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 21:50:42,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:50:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 21:50:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 21:50:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 21:50:42,221 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 21:50:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:42,221 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 21:50:42,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 21:50:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:42,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:42,223 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:42,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:42,437 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-06-12 21:50:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757130638] [2021-06-12 21:50:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:42,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757130638] [2021-06-12 21:50:42,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757130638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901299465] [2021-06-12 21:50:42,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:42,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:50:42,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901299465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:42,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:42,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448572409] [2021-06-12 21:50:42,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:42,600 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:43,225 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 21:50:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:50:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:43,230 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 21:50:43,230 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 21:50:43,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:50:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 21:50:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 21:50:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 21:50:43,251 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 21:50:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:43,252 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 21:50:43,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 21:50:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:43,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:43,253 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:43,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:50:43,472 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-06-12 21:50:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:43,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754497149] [2021-06-12 21:50:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:43,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:43,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754497149] [2021-06-12 21:50:43,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754497149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:43,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846592065] [2021-06-12 21:50:43,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:43,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846592065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:43,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:43,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158212795] [2021-06-12 21:50:43,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:43,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:43,588 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:44,106 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 21:50:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:50:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:44,133 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 21:50:44,133 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 21:50:44,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:50:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 21:50:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 21:50:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 21:50:44,152 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 21:50:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:44,153 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 21:50:44,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 21:50:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:44,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:44,154 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:44,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 21:50:44,369 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-06-12 21:50:44,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:44,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364231406] [2021-06-12 21:50:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:44,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:44,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364231406] [2021-06-12 21:50:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364231406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935723512] [2021-06-12 21:50:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:44,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:50:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:50:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935723512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:44,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:44,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:50:44,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188990366] [2021-06-12 21:50:44,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:50:44,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:50:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:50:44,456 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:44,524 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 21:50:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:50:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:44,526 INFO L225 Difference]: With dead ends: 929 [2021-06-12 21:50:44,526 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 21:50:44,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 21:50:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 21:50:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 21:50:44,548 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 21:50:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:44,548 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 21:50:44,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 21:50:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:44,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:44,550 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:44,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:44,766 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-06-12 21:50:44,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:44,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022797817] [2021-06-12 21:50:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:44,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022797817] [2021-06-12 21:50:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022797817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71575801] [2021-06-12 21:50:44,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:44,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71575801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:44,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:44,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:50:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247709829] [2021-06-12 21:50:44,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:50:44,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:50:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:50:44,887 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:45,183 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 21:50:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:50:45,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:45,205 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 21:50:45,206 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 21:50:45,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:50:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 21:50:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 21:50:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 21:50:45,220 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 21:50:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:45,220 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 21:50:45,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 21:50:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:45,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:45,222 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:45,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 21:50:45,437 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-06-12 21:50:45,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:45,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424944389] [2021-06-12 21:50:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:45,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424944389] [2021-06-12 21:50:45,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424944389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61500704] [2021-06-12 21:50:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:45,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:45,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:45,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61500704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:45,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:45,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:50:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574526446] [2021-06-12 21:50:45,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:50:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:50:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:50:45,548 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:45,805 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 21:50:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:50:45,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:45,808 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 21:50:45,808 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 21:50:45,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:50:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 21:50:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 21:50:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 21:50:45,824 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 21:50:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 21:50:45,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 21:50:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:45,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:45,825 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:46,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:46,041 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-06-12 21:50:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305487487] [2021-06-12 21:50:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:46,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:46,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305487487] [2021-06-12 21:50:46,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305487487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:46,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963482516] [2021-06-12 21:50:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:46,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:46,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:50:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963482516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:46,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:46,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:50:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526117927] [2021-06-12 21:50:46,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:50:46,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:46,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:50:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:50:46,136 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:46,300 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 21:50:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:50:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:46,303 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 21:50:46,303 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 21:50:46,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:50:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 21:50:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 21:50:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 21:50:46,317 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 21:50:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:46,317 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 21:50:46,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 21:50:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:46,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:46,319 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:46,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 21:50:46,529 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:46,529 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-06-12 21:50:46,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:46,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144928523] [2021-06-12 21:50:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:46,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144928523] [2021-06-12 21:50:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144928523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55225291] [2021-06-12 21:50:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:46,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:46,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55225291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:46,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:46,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:50:46,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163174197] [2021-06-12 21:50:46,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:50:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:50:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:50:46,631 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:46,831 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 21:50:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:50:46,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:46,834 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 21:50:46,834 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 21:50:46,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:50:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 21:50:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 21:50:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 21:50:46,848 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 21:50:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:46,848 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 21:50:46,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 21:50:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:46,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:46,850 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:47,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:47,069 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-06-12 21:50:47,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:47,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470305968] [2021-06-12 21:50:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:47,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:47,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470305968] [2021-06-12 21:50:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470305968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:47,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530451687] [2021-06-12 21:50:47,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:47,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:47,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530451687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:47,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:47,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:47,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647530275] [2021-06-12 21:50:47,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:47,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:47,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:47,206 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:47,648 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 21:50:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:50:47,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:47,651 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 21:50:47,651 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 21:50:47,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:50:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 21:50:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 21:50:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 21:50:47,676 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 21:50:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:47,676 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 21:50:47,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 21:50:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:47,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:47,678 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:47,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 21:50:47,893 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-06-12 21:50:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:47,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717635206] [2021-06-12 21:50:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:47,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:47,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717635206] [2021-06-12 21:50:47,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717635206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:47,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051206939] [2021-06-12 21:50:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051206939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:48,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:48,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990255397] [2021-06-12 21:50:48,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:48,060 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:48,492 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 21:50:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:50:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:48,495 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 21:50:48,495 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 21:50:48,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:50:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 21:50:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 21:50:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:50:48,514 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:50:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:48,514 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:50:48,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:50:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:48,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:48,516 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:48,729 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-06-12 21:50:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700358566] [2021-06-12 21:50:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:48,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:48,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700358566] [2021-06-12 21:50:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700358566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:48,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944467088] [2021-06-12 21:50:48,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:48,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:48,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:48,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:48,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944467088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:48,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:48,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845527953] [2021-06-12 21:50:48,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:48,857 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:49,203 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 21:50:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:50:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:49,207 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 21:50:49,208 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 21:50:49,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:50:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 21:50:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 21:50:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 21:50:49,225 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 21:50:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:49,225 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 21:50:49,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 21:50:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:49,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:49,227 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:49,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 21:50:49,437 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-06-12 21:50:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:49,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754489113] [2021-06-12 21:50:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:49,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:49,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754489113] [2021-06-12 21:50:49,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754489113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:49,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174100775] [2021-06-12 21:50:49,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:49,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:49,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:49,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174100775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:49,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:49,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235725190] [2021-06-12 21:50:49,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:49,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:49,555 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:49,890 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 21:50:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:50:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:49,895 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 21:50:49,895 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 21:50:49,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:50:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 21:50:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 21:50:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:50:49,912 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:50:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:49,912 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:50:49,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:50:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:49,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:49,914 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:50,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:50,114 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-06-12 21:50:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:50,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888865310] [2021-06-12 21:50:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:50,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888865310] [2021-06-12 21:50:50,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888865310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540696991] [2021-06-12 21:50:50,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:50,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:50,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:50,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540696991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:50,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:50,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182279240] [2021-06-12 21:50:50,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:50,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:50,241 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:50,591 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 21:50:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:50:50,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:50,594 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 21:50:50,594 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 21:50:50,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:50:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 21:50:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 21:50:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 21:50:50,612 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 21:50:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:50,612 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 21:50:50,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 21:50:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:50,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:50,613 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:50,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:50:50,829 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-06-12 21:50:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:50,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540021591] [2021-06-12 21:50:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:50,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:50,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540021591] [2021-06-12 21:50:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540021591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:50,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979794240] [2021-06-12 21:50:50,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:50,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:50,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:50,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:50,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979794240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:50,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:50,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653867852] [2021-06-12 21:50:50,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:50,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:50,956 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:51,274 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 21:50:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:50:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:51,277 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 21:50:51,277 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 21:50:51,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:50:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 21:50:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 21:50:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:50:51,298 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:50:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:51,298 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:50:51,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:50:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:51,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:51,299 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:51,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:50:51,516 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-06-12 21:50:51,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:51,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149433516] [2021-06-12 21:50:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:51,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:51,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149433516] [2021-06-12 21:50:51,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149433516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:51,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002944466] [2021-06-12 21:50:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:51,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:51,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:51,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002944466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:51,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:51,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122622159] [2021-06-12 21:50:51,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:51,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:51,624 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:51,936 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 21:50:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:50:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:51,939 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 21:50:51,939 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 21:50:51,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:50:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 21:50:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 21:50:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 21:50:51,956 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 21:50:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:51,956 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 21:50:51,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 21:50:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:51,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:51,958 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:52,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 21:50:52,158 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-06-12 21:50:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:52,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416794115] [2021-06-12 21:50:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:52,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:52,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416794115] [2021-06-12 21:50:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416794115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:52,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308598352] [2021-06-12 21:50:52,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308598352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:52,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:52,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:52,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969692008] [2021-06-12 21:50:52,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:52,286 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:52,552 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 21:50:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:50:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:52,555 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 21:50:52,555 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 21:50:52,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:50:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 21:50:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 21:50:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 21:50:52,597 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 21:50:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:52,598 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 21:50:52,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 21:50:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:52,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:52,599 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:52,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:50:52,800 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-06-12 21:50:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:52,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493976565] [2021-06-12 21:50:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493976565] [2021-06-12 21:50:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493976565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065543518] [2021-06-12 21:50:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:50:52,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:52,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065543518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:52,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:52,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:50:52,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703980183] [2021-06-12 21:50:52,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:50:52,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:50:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:50:52,956 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:53,133 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 21:50:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:50:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:53,136 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 21:50:53,136 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 21:50:53,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 21:50:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 21:50:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 21:50:53,152 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 21:50:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:53,152 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 21:50:53,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 21:50:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:53,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:53,154 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:53,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:53,369 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-06-12 21:50:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:53,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158048405] [2021-06-12 21:50:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158048405] [2021-06-12 21:50:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158048405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955894701] [2021-06-12 21:50:53,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:53,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:53,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955894701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:53,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:53,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:53,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729044366] [2021-06-12 21:50:53,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:53,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:53,505 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:53,799 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 21:50:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:50:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:53,802 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 21:50:53,802 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 21:50:53,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:50:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 21:50:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 21:50:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 21:50:53,818 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 21:50:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:53,818 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 21:50:53,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 21:50:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:53,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:53,819 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:54,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:54,021 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-06-12 21:50:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270023878] [2021-06-12 21:50:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:54,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:54,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270023878] [2021-06-12 21:50:54,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270023878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:54,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670800277] [2021-06-12 21:50:54,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:54,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:54,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:54,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670800277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:54,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:54,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:50:54,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642809758] [2021-06-12 21:50:54,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:50:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:50:54,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:50:54,163 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:54,412 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 21:50:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:50:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:54,414 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 21:50:54,414 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 21:50:54,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:50:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 21:50:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 21:50:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 21:50:54,431 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 21:50:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:54,431 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 21:50:54,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 21:50:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:50:54,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:54,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:54,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 21:50:54,653 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-06-12 21:50:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:54,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962451018] [2021-06-12 21:50:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:54,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:54,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962451018] [2021-06-12 21:50:54,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962451018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:54,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724100560] [2021-06-12 21:50:54,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:54,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:50:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:54,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724100560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:54,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:54,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:50:54,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634870684] [2021-06-12 21:50:54,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:50:54,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:54,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:50:54,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:50:54,757 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:54,905 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 21:50:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:50:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:50:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:54,908 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 21:50:54,908 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 21:50:54,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:50:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 21:50:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 21:50:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 21:50:54,922 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 21:50:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:54,923 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 21:50:54,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 21:50:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:50:54,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:54,924 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:55,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:55,125 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-06-12 21:50:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:55,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173803258] [2021-06-12 21:50:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:55,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173803258] [2021-06-12 21:50:55,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173803258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499827780] [2021-06-12 21:50:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:55,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:50:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:50:55,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:55,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:55,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:50:55,562 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:55,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:55,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:55,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:50:55,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:55,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:55,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:55,588 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:50:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:55,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499827780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:55,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:55,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:50:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308380076] [2021-06-12 21:50:55,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:50:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:50:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:50:55,604 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:56,067 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-12 21:50:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:50:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:50:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:56,069 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 21:50:56,069 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 21:50:56,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:50:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 21:50:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-12 21:50:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 21:50:56,083 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 21:50:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:56,084 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 21:50:56,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 21:50:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:50:56,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:56,086 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:56,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:56,297 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-06-12 21:50:56,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:56,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993955731] [2021-06-12 21:50:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:56,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:56,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993955731] [2021-06-12 21:50:56,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993955731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:56,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402485450] [2021-06-12 21:50:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:56,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:50:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:56,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:56,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:50:56,731 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:56,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:56,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:56,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:50:56,742 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:56,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:50:56,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:56,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:56,765 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:50:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402485450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:56,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:56,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:50:56,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938213433] [2021-06-12 21:50:56,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:50:56,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:56,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:50:56,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:50:56,796 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:50:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:57,308 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-12 21:50:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:50:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 21:50:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:57,310 INFO L225 Difference]: With dead ends: 1495 [2021-06-12 21:50:57,310 INFO L226 Difference]: Without dead ends: 1480 [2021-06-12 21:50:57,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:50:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-12 21:50:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-12 21:50:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-12 21:50:57,324 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-12 21:50:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:57,324 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-12 21:50:57,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:50:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-12 21:50:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:50:57,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:57,326 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:57,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:57,526 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-06-12 21:50:57,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:57,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964835831] [2021-06-12 21:50:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:57,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:57,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964835831] [2021-06-12 21:50:57,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964835831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:57,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152141213] [2021-06-12 21:50:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:57,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:50:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:58,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:58,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:58,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:50:58,006 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:58,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:58,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:58,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:58,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 21:50:58,020 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:50:58,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:58,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:58,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:50:58,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:58,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:58,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:58,042 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:50:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152141213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:58,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:58,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 21:50:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713318415] [2021-06-12 21:50:58,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:50:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:50:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:50:58,056 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:59,652 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-12 21:50:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:50:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:50:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:59,654 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 21:50:59,654 INFO L226 Difference]: Without dead ends: 1635 [2021-06-12 21:50:59,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:50:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-12 21:50:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-12 21:50:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-12 21:50:59,674 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-12 21:50:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:59,674 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-12 21:50:59,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-12 21:50:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:50:59,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:59,676 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:59,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 21:50:59,876 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-06-12 21:50:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:59,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435597636] [2021-06-12 21:50:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:00,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:00,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435597636] [2021-06-12 21:51:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435597636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:00,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96826268] [2021-06-12 21:51:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:00,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:51:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:00,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:51:00,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:00,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:00,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:51:00,292 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:00,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:51:00,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:51:00,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:00,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:00,400 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:51:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:00,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96826268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:00,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:00,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:51:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171326823] [2021-06-12 21:51:00,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:51:00,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:51:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:51:00,434 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:01,872 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-12 21:51:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:51:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:51:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:01,875 INFO L225 Difference]: With dead ends: 1879 [2021-06-12 21:51:01,875 INFO L226 Difference]: Without dead ends: 1864 [2021-06-12 21:51:01,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:51:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-12 21:51:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-12 21:51:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-12 21:51:01,891 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-12 21:51:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:01,891 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-12 21:51:01,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-12 21:51:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:51:01,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:01,893 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:02,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:02,109 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-06-12 21:51:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:02,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984790967] [2021-06-12 21:51:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:02,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984790967] [2021-06-12 21:51:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984790967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192307330] [2021-06-12 21:51:02,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:51:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:02,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:02,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:51:02,724 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:02,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:02,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:02,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:51:02,846 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:02,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:02,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:02,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:51:03,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:51:03,625 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-06-12 21:51:03,626 INFO L628 ElimStorePlain]: treesize reduction 164, result has 91.1 percent of original size [2021-06-12 21:51:03,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:03,995 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:102 [2021-06-12 21:51:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192307330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:04,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:04,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:51:04,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426027886] [2021-06-12 21:51:04,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:51:04,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:51:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:51:04,047 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:04,592 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-12 21:51:05,387 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-12 21:51:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:06,065 INFO L93 Difference]: Finished difference Result 1814 states and 5791 transitions. [2021-06-12 21:51:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:51:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:51:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:06,068 INFO L225 Difference]: With dead ends: 1814 [2021-06-12 21:51:06,068 INFO L226 Difference]: Without dead ends: 1799 [2021-06-12 21:51:06,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1846.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:51:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-12 21:51:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1206. [2021-06-12 21:51:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-12 21:51:06,083 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-12 21:51:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:06,084 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-12 21:51:06,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-12 21:51:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:51:06,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:06,085 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:06,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:06,286 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:06,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-06-12 21:51:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:06,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135877160] [2021-06-12 21:51:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:06,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135877160] [2021-06-12 21:51:06,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135877160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752224673] [2021-06-12 21:51:06,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:51:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:10,124 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-12 21:51:10,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:10,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 83 [2021-06-12 21:51:10,842 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:10,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:10,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:10,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-06-12 21:51:11,553 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:51:11,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:11,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:51:11,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:51:12,758 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-06-12 21:51:12,759 INFO L628 ElimStorePlain]: treesize reduction 536, result has 75.4 percent of original size [2021-06-12 21:51:13,597 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 227 [2021-06-12 21:51:14,955 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-12 21:51:15,114 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-12 21:51:15,292 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-12 21:51:16,106 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-12 21:51:16,239 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-12 21:51:16,396 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 221 [2021-06-12 21:51:16,718 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 296 [2021-06-12 21:51:17,587 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-12 21:51:17,696 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-12 21:51:19,109 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-12 21:51:19,546 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-12 21:51:20,122 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 502 [2021-06-12 21:51:20,269 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2021-06-12 21:51:20,729 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 196 [2021-06-12 21:51:21,126 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 295 [2021-06-12 21:51:21,805 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-12 21:51:22,418 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-12 21:51:23,847 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 511 DAG size of output: 493 [2021-06-12 21:51:24,374 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 399 [2021-06-12 21:51:25,023 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-12 21:51:25,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:25,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:14812 [2021-06-12 21:51:25,679 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-12 21:51:26,004 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-12 21:51:26,330 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-12 21:51:26,656 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-12 21:51:27,793 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 359 DAG size of output: 57 [2021-06-12 21:51:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:27,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752224673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:27,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:27,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 21:51:27,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76447560] [2021-06-12 21:51:27,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:27,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=429, Unknown=3, NotChecked=0, Total=506 [2021-06-12 21:51:27,918 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:49,308 WARN L205 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 21:52:19,453 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2021-06-12 21:52:23,491 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 21:52:32,482 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-06-12 21:52:34,574 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 21:52:45,747 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 21:52:47,101 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 21:52:47,257 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-12 21:52:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:48,379 INFO L93 Difference]: Finished difference Result 2289 states and 7148 transitions. [2021-06-12 21:52:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:52:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:48,383 INFO L225 Difference]: With dead ends: 2289 [2021-06-12 21:52:48,383 INFO L226 Difference]: Without dead ends: 2259 [2021-06-12 21:52:48,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 36894.7ms TimeCoverageRelationStatistics Valid=438, Invalid=2620, Unknown=22, NotChecked=0, Total=3080 [2021-06-12 21:52:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-12 21:52:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1219. [2021-06-12 21:52:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-12 21:52:48,403 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-12 21:52:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:48,403 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-12 21:52:48,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-12 21:52:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:48,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:48,405 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:48,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-12 21:52:48,606 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash 860987935, now seen corresponding path program 7 times [2021-06-12 21:52:48,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:48,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461209857] [2021-06-12 21:52:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:48,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:48,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461209857] [2021-06-12 21:52:48,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461209857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:48,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978555896] [2021-06-12 21:52:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:52:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:48,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:48,978 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 43 treesize of output 35 [2021-06-12 21:52:48,980 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:48,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:48,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:52:48,990 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:48,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:49,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:49,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:52:49,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:52:49,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:49,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:49,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:52:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:49,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978555896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:49,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:52:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930971709] [2021-06-12 21:52:49,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:52:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:52:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:52:49,025 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:49,591 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-12 21:52:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:52:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:49,594 INFO L225 Difference]: With dead ends: 1622 [2021-06-12 21:52:49,594 INFO L226 Difference]: Without dead ends: 1607 [2021-06-12 21:52:49,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:52:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-12 21:52:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-12 21:52:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-12 21:52:49,611 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-12 21:52:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:49,611 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-12 21:52:49,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-12 21:52:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:49,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:49,613 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:49,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:49,829 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1167410081, now seen corresponding path program 8 times [2021-06-12 21:52:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:49,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195858559] [2021-06-12 21:52:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:50,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195858559] [2021-06-12 21:52:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195858559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:50,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787055564] [2021-06-12 21:52:50,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:50,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:52:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:52:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:50,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:52:50,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:50,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:52:50,299 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:50,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:52:50,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:52:50,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:50,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:50,481 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:102 [2021-06-12 21:52:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787055564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:50,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:50,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 21:52:50,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646126252] [2021-06-12 21:52:50,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:52:50,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:52:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:52:50,542 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:51,505 INFO L93 Difference]: Finished difference Result 1684 states and 5459 transitions. [2021-06-12 21:52:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:52:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:51,508 INFO L225 Difference]: With dead ends: 1684 [2021-06-12 21:52:51,508 INFO L226 Difference]: Without dead ends: 1669 [2021-06-12 21:52:51,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:52:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-12 21:52:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1233. [2021-06-12 21:52:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3490259740259742) internal successors, (4126), 1232 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4126 transitions. [2021-06-12 21:52:51,523 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4126 transitions. Word has length 26 [2021-06-12 21:52:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:51,523 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4126 transitions. [2021-06-12 21:52:51,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4126 transitions. [2021-06-12 21:52:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:51,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:51,524 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:51,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1668 [2021-06-12 21:52:51,725 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1190147507, now seen corresponding path program 9 times [2021-06-12 21:52:51,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:51,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749117018] [2021-06-12 21:52:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:51,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749117018] [2021-06-12 21:52:51,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749117018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728683231] [2021-06-12 21:52:51,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:51,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:52:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:52:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:52,097 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 43 treesize of output 35 [2021-06-12 21:52:52,099 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:52,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:52,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:52:52,111 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:52,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:52,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:52,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:52:52,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:52:52,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:52,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:52,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-12 21:52:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728683231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:52,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:52,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:52:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136155377] [2021-06-12 21:52:52,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:52:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:52:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:52:52,152 INFO L87 Difference]: Start difference. First operand 1233 states and 4126 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:55,506 INFO L93 Difference]: Finished difference Result 1868 states and 6059 transitions. [2021-06-12 21:52:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:52:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:55,509 INFO L225 Difference]: With dead ends: 1868 [2021-06-12 21:52:55,509 INFO L226 Difference]: Without dead ends: 1853 [2021-06-12 21:52:55,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:52:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-12 21:52:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-12 21:52:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.353746978243352) internal successors, (4162), 1241 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4162 transitions. [2021-06-12 21:52:55,525 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4162 transitions. Word has length 26 [2021-06-12 21:52:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:55,525 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4162 transitions. [2021-06-12 21:52:55,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4162 transitions. [2021-06-12 21:52:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:55,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:55,527 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:55,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:55,727 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1022338415, now seen corresponding path program 10 times [2021-06-12 21:52:55,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:55,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922609508] [2021-06-12 21:52:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:55,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:55,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922609508] [2021-06-12 21:52:55,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922609508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:55,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562365907] [2021-06-12 21:52:55,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:55,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:52:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:52:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:56,096 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 43 treesize of output 35 [2021-06-12 21:52:56,098 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:56,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:56,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:52:56,110 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:56,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:56,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:56,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:52:56,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:52:56,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:56,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:56,132 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:52:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562365907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:56,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:56,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 21:52:56,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674763939] [2021-06-12 21:52:56,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:52:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:52:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:52:56,150 INFO L87 Difference]: Start difference. First operand 1242 states and 4162 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:56,548 INFO L93 Difference]: Finished difference Result 1549 states and 5097 transitions. [2021-06-12 21:52:56,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:52:56,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:56,551 INFO L225 Difference]: With dead ends: 1549 [2021-06-12 21:52:56,551 INFO L226 Difference]: Without dead ends: 1534 [2021-06-12 21:52:56,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:52:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-12 21:52:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1238. [2021-06-12 21:52:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-12 21:52:56,565 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-12 21:52:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:56,565 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-12 21:52:56,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:56,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-12 21:52:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:56,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:56,574 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:56,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:56,775 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1045177613, now seen corresponding path program 11 times [2021-06-12 21:52:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:56,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114458012] [2021-06-12 21:52:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:56,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114458012] [2021-06-12 21:52:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114458012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924079629] [2021-06-12 21:52:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:56,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:52:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:52:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:57,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:52:57,100 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:57,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:57,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:52:57,134 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:57,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:52:57,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:52:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:57,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:57,221 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-12 21:52:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:57,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924079629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:57,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:57,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:52:57,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350341772] [2021-06-12 21:52:57,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:52:57,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:52:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:52:57,260 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:58,250 INFO L93 Difference]: Finished difference Result 2068 states and 6699 transitions. [2021-06-12 21:52:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:52:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:52:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:58,253 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 21:52:58,253 INFO L226 Difference]: Without dead ends: 2053 [2021-06-12 21:52:58,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:52:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-12 21:52:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1238. [2021-06-12 21:52:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-12 21:52:58,271 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-12 21:52:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:58,272 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-12 21:52:58,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-12 21:52:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:52:58,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:58,273 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:58,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-12 21:52:58,474 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1541898973, now seen corresponding path program 12 times [2021-06-12 21:52:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:58,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098665736] [2021-06-12 21:52:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:58,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098665736] [2021-06-12 21:52:58,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098665736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662521967] [2021-06-12 21:52:58,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:58,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:52:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:52:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:58,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:52:58,842 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:58,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:58,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:52:58,873 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:52:58,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:52:58,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:52:58,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:58,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:58,955 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:24 [2021-06-12 21:52:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:58,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662521967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:58,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:58,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:52:58,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787649759] [2021-06-12 21:52:58,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:52:58,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:58,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:52:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:52:58,990 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:00,298 INFO L93 Difference]: Finished difference Result 1885 states and 6123 transitions. [2021-06-12 21:53:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:53:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:00,301 INFO L225 Difference]: With dead ends: 1885 [2021-06-12 21:53:00,301 INFO L226 Difference]: Without dead ends: 1870 [2021-06-12 21:53:00,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1149.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:53:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-06-12 21:53:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1238. [2021-06-12 21:53:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-12 21:53:00,318 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-12 21:53:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:00,319 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-12 21:53:00,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-12 21:53:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:00,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:00,320 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:00,534 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -73165897, now seen corresponding path program 39 times [2021-06-12 21:53:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654046359] [2021-06-12 21:53:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:00,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:00,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654046359] [2021-06-12 21:53:00,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654046359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:00,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446969922] [2021-06-12 21:53:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:00,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:53:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:53:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:00,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:00,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:00,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:53:00,859 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:00,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:00,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:00,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 21:53:00,871 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:00,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:00,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:00,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:00,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:00,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:00,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:00,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:53:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:00,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446969922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:00,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:00,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 21:53:00,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7786565] [2021-06-12 21:53:00,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:00,913 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:02,764 INFO L93 Difference]: Finished difference Result 2877 states and 8911 transitions. [2021-06-12 21:53:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:53:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:02,768 INFO L225 Difference]: With dead ends: 2877 [2021-06-12 21:53:02,768 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 21:53:02,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1418.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:53:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 21:53:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1288. [2021-06-12 21:53:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3737373737373737) internal successors, (4342), 1287 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4342 transitions. [2021-06-12 21:53:02,789 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4342 transitions. Word has length 26 [2021-06-12 21:53:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:02,789 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4342 transitions. [2021-06-12 21:53:02,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4342 transitions. [2021-06-12 21:53:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:02,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:02,791 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:02,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-06-12 21:53:02,992 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1129146471, now seen corresponding path program 40 times [2021-06-12 21:53:02,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:02,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344862242] [2021-06-12 21:53:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:03,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344862242] [2021-06-12 21:53:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344862242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520360897] [2021-06-12 21:53:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:03,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:03,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:53:03,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:53:03,327 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:03,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:03,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:03,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:03,337 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 37 treesize of output 27 [2021-06-12 21:53:03,338 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:03,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:03,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:03,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:03,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:03,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:03,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:03,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:53:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520360897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:03,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:03,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 21:53:03,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841073196] [2021-06-12 21:53:03,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:03,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:03,378 INFO L87 Difference]: Start difference. First operand 1288 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:04,922 INFO L93 Difference]: Finished difference Result 2741 states and 8623 transitions. [2021-06-12 21:53:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:53:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:04,926 INFO L225 Difference]: With dead ends: 2741 [2021-06-12 21:53:04,926 INFO L226 Difference]: Without dead ends: 2696 [2021-06-12 21:53:04,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1321.0ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:53:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-12 21:53:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1284. [2021-06-12 21:53:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.38269680436477) internal successors, (4340), 1283 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4340 transitions. [2021-06-12 21:53:04,947 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4340 transitions. Word has length 26 [2021-06-12 21:53:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:04,947 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4340 transitions. [2021-06-12 21:53:04,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4340 transitions. [2021-06-12 21:53:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:04,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:04,949 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:05,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:05,150 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1332172173, now seen corresponding path program 41 times [2021-06-12 21:53:05,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:05,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223469205] [2021-06-12 21:53:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:05,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:05,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223469205] [2021-06-12 21:53:05,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223469205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:05,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541579501] [2021-06-12 21:53:05,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:05,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:53:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:53:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:05,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:05,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-12 21:53:05,552 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:05,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:05,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:05,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 21:53:05,666 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:05,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:05,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:53:05,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:06,377 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-12 21:53:06,378 INFO L628 ElimStorePlain]: treesize reduction 198, result has 89.8 percent of original size [2021-06-12 21:53:06,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:06,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2021-06-12 21:53:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541579501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:06,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:06,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 21:53:06,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321639598] [2021-06-12 21:53:06,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:06,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:06,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:06,730 INFO L87 Difference]: Start difference. First operand 1284 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:08,694 INFO L93 Difference]: Finished difference Result 3022 states and 9448 transitions. [2021-06-12 21:53:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:53:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:08,698 INFO L225 Difference]: With dead ends: 3022 [2021-06-12 21:53:08,698 INFO L226 Difference]: Without dead ends: 2977 [2021-06-12 21:53:08,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1651.0ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:53:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-12 21:53:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1288. [2021-06-12 21:53:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3885003885003884) internal successors, (4361), 1287 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4361 transitions. [2021-06-12 21:53:08,720 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4361 transitions. Word has length 26 [2021-06-12 21:53:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:08,720 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4361 transitions. [2021-06-12 21:53:08,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4361 transitions. [2021-06-12 21:53:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:08,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:08,722 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:08,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-06-12 21:53:08,923 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1119783259, now seen corresponding path program 13 times [2021-06-12 21:53:08,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:08,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604615641] [2021-06-12 21:53:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:09,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:09,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604615641] [2021-06-12 21:53:09,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604615641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:09,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826289307] [2021-06-12 21:53:09,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:53:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:09,287 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 43 treesize of output 35 [2021-06-12 21:53:09,289 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:09,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:53:09,299 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:09,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:09,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:09,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:09,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:09,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:09,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:53:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:09,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826289307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:09,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:09,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:53:09,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926248543] [2021-06-12 21:53:09,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:53:09,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:53:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:53:09,333 INFO L87 Difference]: Start difference. First operand 1288 states and 4361 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:09,721 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2021-06-12 21:53:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:53:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:09,723 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 21:53:09,723 INFO L226 Difference]: Without dead ends: 1635 [2021-06-12 21:53:09,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:53:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-12 21:53:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1297. [2021-06-12 21:53:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.388117283950617) internal successors, (4391), 1296 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4391 transitions. [2021-06-12 21:53:09,740 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4391 transitions. Word has length 26 [2021-06-12 21:53:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:09,740 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4391 transitions. [2021-06-12 21:53:09,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4391 transitions. [2021-06-12 21:53:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:09,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:09,741 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:09,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-06-12 21:53:09,942 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1448942831, now seen corresponding path program 14 times [2021-06-12 21:53:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:09,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026922615] [2021-06-12 21:53:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:10,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026922615] [2021-06-12 21:53:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026922615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798281412] [2021-06-12 21:53:10,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:10,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:53:10,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:53:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:10,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:53:10,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:10,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:53:10,473 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:10,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:10,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:10,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:10,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:10,632 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:75 [2021-06-12 21:53:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798281412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:10,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 21:53:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996632629] [2021-06-12 21:53:10,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:10,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:10,698 INFO L87 Difference]: Start difference. First operand 1297 states and 4391 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:11,785 INFO L93 Difference]: Finished difference Result 2002 states and 6515 transitions. [2021-06-12 21:53:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:53:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:11,788 INFO L225 Difference]: With dead ends: 2002 [2021-06-12 21:53:11,788 INFO L226 Difference]: Without dead ends: 1987 [2021-06-12 21:53:11,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:53:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-12 21:53:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1289. [2021-06-12 21:53:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3975155279503104) internal successors, (4376), 1288 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4376 transitions. [2021-06-12 21:53:11,806 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4376 transitions. Word has length 26 [2021-06-12 21:53:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:11,806 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4376 transitions. [2021-06-12 21:53:11,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4376 transitions. [2021-06-12 21:53:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:11,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:11,808 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:12,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:12,008 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1281133739, now seen corresponding path program 15 times [2021-06-12 21:53:12,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:12,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587472669] [2021-06-12 21:53:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:12,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:12,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587472669] [2021-06-12 21:53:12,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587472669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:12,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156061318] [2021-06-12 21:53:12,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:12,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:53:12,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:53:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:12,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-12 21:53:12,474 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:12,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 21:53:12,592 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:12,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:12,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:12,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:12,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 16 xjuncts. [2021-06-12 21:53:12,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:617 [2021-06-12 21:53:13,181 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-12 21:53:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:13,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156061318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:13,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:13,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-12 21:53:13,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50342588] [2021-06-12 21:53:13,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:53:13,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:53:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:53:13,320 INFO L87 Difference]: Start difference. First operand 1289 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 21:53:16,457 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-12 21:53:19,924 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 21:53:27,206 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-12 21:53:27,366 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-12 21:53:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:27,427 INFO L93 Difference]: Finished difference Result 1952 states and 6311 transitions. [2021-06-12 21:53:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:53:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-12 21:53:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:27,430 INFO L225 Difference]: With dead ends: 1952 [2021-06-12 21:53:27,430 INFO L226 Difference]: Without dead ends: 1937 [2021-06-12 21:53:27,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 12556.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1753, Unknown=4, NotChecked=0, Total=2070 [2021-06-12 21:53:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-12 21:53:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1302. [2021-06-12 21:53:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.4027671022290544) internal successors, (4427), 1301 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4427 transitions. [2021-06-12 21:53:27,448 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4427 transitions. Word has length 26 [2021-06-12 21:53:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:27,448 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4427 transitions. [2021-06-12 21:53:27,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 21:53:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4427 transitions. [2021-06-12 21:53:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:27,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:27,450 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:27,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-12 21:53:27,665 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1261165713, now seen corresponding path program 16 times [2021-06-12 21:53:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614767279] [2021-06-12 21:53:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:27,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:27,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614767279] [2021-06-12 21:53:27,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614767279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:27,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963505469] [2021-06-12 21:53:27,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:27,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:53:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:27,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:27,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:53:27,991 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:28,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:28,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:28,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:53:28,026 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:28,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:28,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:28,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:28,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:28,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:28,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:28,125 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:17 [2021-06-12 21:53:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:28,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963505469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:28,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:28,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 21:53:28,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961406715] [2021-06-12 21:53:28,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:53:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:53:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:53:28,175 INFO L87 Difference]: Start difference. First operand 1302 states and 4427 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:28,560 INFO L93 Difference]: Finished difference Result 1783 states and 5883 transitions. [2021-06-12 21:53:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:53:28,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:28,563 INFO L225 Difference]: With dead ends: 1783 [2021-06-12 21:53:28,563 INFO L226 Difference]: Without dead ends: 1768 [2021-06-12 21:53:28,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:53:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-12 21:53:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1298. [2021-06-12 21:53:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.397070161912105) internal successors, (4406), 1297 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4406 transitions. [2021-06-12 21:53:28,579 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4406 transitions. Word has length 26 [2021-06-12 21:53:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:28,579 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4406 transitions. [2021-06-12 21:53:28,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4406 transitions. [2021-06-12 21:53:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:28,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:28,581 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:28,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:28,782 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1283103649, now seen corresponding path program 17 times [2021-06-12 21:53:28,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:28,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39413011] [2021-06-12 21:53:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:28,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:28,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39413011] [2021-06-12 21:53:28,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39413011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:28,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781090128] [2021-06-12 21:53:28,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:28,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:53:28,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:53:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:29,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:53:29,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:29,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:29,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:53:29,214 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:29,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:29,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:29,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:29,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:29,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:29,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:53:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:29,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781090128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:29,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:29,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 21:53:29,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523054008] [2021-06-12 21:53:29,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:53:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:53:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:53:29,259 INFO L87 Difference]: Start difference. First operand 1298 states and 4406 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:30,241 INFO L93 Difference]: Finished difference Result 1768 states and 5860 transitions. [2021-06-12 21:53:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:53:30,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:30,244 INFO L225 Difference]: With dead ends: 1768 [2021-06-12 21:53:30,244 INFO L226 Difference]: Without dead ends: 1753 [2021-06-12 21:53:30,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 870.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:53:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-06-12 21:53:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1301. [2021-06-12 21:53:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3984615384615386) internal successors, (4418), 1300 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4418 transitions. [2021-06-12 21:53:30,265 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4418 transitions. Word has length 26 [2021-06-12 21:53:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:30,265 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4418 transitions. [2021-06-12 21:53:30,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4418 transitions. [2021-06-12 21:53:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:30,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:30,267 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:30,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-12 21:53:30,467 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1394330867, now seen corresponding path program 18 times [2021-06-12 21:53:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:30,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793380874] [2021-06-12 21:53:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793380874] [2021-06-12 21:53:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793380874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561106865] [2021-06-12 21:53:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:30,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:53:30,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:53:30,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:30,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:53:30,819 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:30,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:30,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:53:30,852 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:30,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:30,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:30,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:30,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:30,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-12 21:53:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:30,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561106865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:30,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:30,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:53:30,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429537767] [2021-06-12 21:53:30,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:53:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:53:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:53:30,983 INFO L87 Difference]: Start difference. First operand 1301 states and 4418 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:31,801 INFO L93 Difference]: Finished difference Result 2171 states and 7095 transitions. [2021-06-12 21:53:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:53:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:31,804 INFO L225 Difference]: With dead ends: 2171 [2021-06-12 21:53:31,804 INFO L226 Difference]: Without dead ends: 2156 [2021-06-12 21:53:31,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 707.1ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:53:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-12 21:53:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1295. [2021-06-12 21:53:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3956723338485317) internal successors, (4394), 1294 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4394 transitions. [2021-06-12 21:53:31,825 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4394 transitions. Word has length 26 [2021-06-12 21:53:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:31,825 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4394 transitions. [2021-06-12 21:53:31,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4394 transitions. [2021-06-12 21:53:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:31,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:31,827 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:32,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-12 21:53:32,027 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash 911449975, now seen corresponding path program 19 times [2021-06-12 21:53:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191700553] [2021-06-12 21:53:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:32,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:32,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191700553] [2021-06-12 21:53:32,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191700553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560106246] [2021-06-12 21:53:32,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:53:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:53:32,390 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:32,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:53:32,400 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:32,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:32,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:32,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:32,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:32,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:32,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:53:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560106246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:32,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:32,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:53:32,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740478563] [2021-06-12 21:53:32,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:53:32,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:53:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:53:32,433 INFO L87 Difference]: Start difference. First operand 1295 states and 4394 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:32,850 INFO L93 Difference]: Finished difference Result 1728 states and 5699 transitions. [2021-06-12 21:53:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:53:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:32,853 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 21:53:32,853 INFO L226 Difference]: Without dead ends: 1707 [2021-06-12 21:53:32,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:53:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-12 21:53:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1336. [2021-06-12 21:53:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.390262172284644) internal successors, (4526), 1335 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4526 transitions. [2021-06-12 21:53:32,870 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4526 transitions. Word has length 26 [2021-06-12 21:53:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:32,870 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4526 transitions. [2021-06-12 21:53:32,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4526 transitions. [2021-06-12 21:53:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:32,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:32,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:33,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:33,089 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 743640883, now seen corresponding path program 20 times [2021-06-12 21:53:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:33,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757140124] [2021-06-12 21:53:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:33,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757140124] [2021-06-12 21:53:33,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757140124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:33,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888049065] [2021-06-12 21:53:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:33,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:53:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:53:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:33,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:53:33,492 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:33,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:53:33,552 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:33,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:33,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:33,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:184 [2021-06-12 21:53:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888049065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:33,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:33,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-12 21:53:33,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820295385] [2021-06-12 21:53:33,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:53:33,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:53:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:53:33,787 INFO L87 Difference]: Start difference. First operand 1336 states and 4526 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 21:53:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:34,906 INFO L93 Difference]: Finished difference Result 1950 states and 6250 transitions. [2021-06-12 21:53:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:53:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-12 21:53:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:34,909 INFO L225 Difference]: With dead ends: 1950 [2021-06-12 21:53:34,909 INFO L226 Difference]: Without dead ends: 1925 [2021-06-12 21:53:34,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1032.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:53:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-12 21:53:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1350. [2021-06-12 21:53:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3995552260934025) internal successors, (4586), 1349 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4586 transitions. [2021-06-12 21:53:34,926 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4586 transitions. Word has length 26 [2021-06-12 21:53:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:34,926 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4586 transitions. [2021-06-12 21:53:34,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 21:53:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4586 transitions. [2021-06-12 21:53:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:34,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:34,928 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:35,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2088,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:35,144 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 723672857, now seen corresponding path program 21 times [2021-06-12 21:53:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:35,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620121901] [2021-06-12 21:53:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620121901] [2021-06-12 21:53:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620121901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027074968] [2021-06-12 21:53:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:35,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:53:35,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:53:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:35,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:53:35,560 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:35,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:35,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:53:35,594 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:35,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:35,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:35,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:35,681 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-12 21:53:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:35,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027074968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:35,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:35,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 21:53:35,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083402598] [2021-06-12 21:53:35,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:35,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:35,719 INFO L87 Difference]: Start difference. First operand 1350 states and 4586 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:36,436 INFO L93 Difference]: Finished difference Result 1841 states and 6067 transitions. [2021-06-12 21:53:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:53:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:36,439 INFO L225 Difference]: With dead ends: 1841 [2021-06-12 21:53:36,439 INFO L226 Difference]: Without dead ends: 1812 [2021-06-12 21:53:36,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:53:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-12 21:53:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1353. [2021-06-12 21:53:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.400147928994083) internal successors, (4597), 1352 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4597 transitions. [2021-06-12 21:53:36,455 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4597 transitions. Word has length 26 [2021-06-12 21:53:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:36,455 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4597 transitions. [2021-06-12 21:53:36,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4597 transitions. [2021-06-12 21:53:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:36,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:36,457 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:36,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2139 [2021-06-12 21:53:36,658 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:36,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1042414331, now seen corresponding path program 22 times [2021-06-12 21:53:36,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:36,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798251680] [2021-06-12 21:53:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:36,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798251680] [2021-06-12 21:53:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798251680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780238251] [2021-06-12 21:53:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:53:36,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:36,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:36,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:53:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:37,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:37,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:37,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:53:37,092 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:37,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:37,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:53:37,104 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:37,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:37,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:37,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:37,129 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:53:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:37,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780238251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:37,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:37,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 21:53:37,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591713594] [2021-06-12 21:53:37,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:53:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:53:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:53:37,148 INFO L87 Difference]: Start difference. First operand 1353 states and 4597 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:38,214 INFO L93 Difference]: Finished difference Result 1466 states and 4903 transitions. [2021-06-12 21:53:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:53:38,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:38,217 INFO L225 Difference]: With dead ends: 1466 [2021-06-12 21:53:38,217 INFO L226 Difference]: Without dead ends: 1451 [2021-06-12 21:53:38,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:53:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-12 21:53:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1359. [2021-06-12 21:53:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.402061855670103) internal successors, (4620), 1358 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4620 transitions. [2021-06-12 21:53:38,231 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4620 transitions. Word has length 26 [2021-06-12 21:53:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:38,231 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 4620 transitions. [2021-06-12 21:53:38,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4620 transitions. [2021-06-12 21:53:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:38,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:38,233 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:38,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2158,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:38,435 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727365, now seen corresponding path program 23 times [2021-06-12 21:53:38,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:38,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236804996] [2021-06-12 21:53:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:38,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:38,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236804996] [2021-06-12 21:53:38,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236804996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:38,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233689398] [2021-06-12 21:53:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:38,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:53:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:53:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:41,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:53:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:41,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:41,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:53:41,108 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:41,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:41,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:41,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:41,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:15 [2021-06-12 21:53:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233689398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:41,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:41,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 21:53:41,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213244855] [2021-06-12 21:53:41,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:53:41,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:53:41,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2021-06-12 21:53:41,230 INFO L87 Difference]: Start difference. First operand 1359 states and 4620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:53:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:41,879 INFO L93 Difference]: Finished difference Result 1987 states and 6490 transitions. [2021-06-12 21:53:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:53:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-12 21:53:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:41,882 INFO L225 Difference]: With dead ends: 1987 [2021-06-12 21:53:41,882 INFO L226 Difference]: Without dead ends: 1937 [2021-06-12 21:53:41,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2888.3ms TimeCoverageRelationStatistics Valid=191, Invalid=863, Unknown=2, NotChecked=0, Total=1056 [2021-06-12 21:53:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-12 21:53:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1366. [2021-06-12 21:53:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.4065934065934065) internal successors, (4650), 1365 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4650 transitions. [2021-06-12 21:53:41,902 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4650 transitions. Word has length 26 [2021-06-12 21:53:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:41,902 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4650 transitions. [2021-06-12 21:53:41,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:53:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4650 transitions. [2021-06-12 21:53:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:41,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:41,904 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:42,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-12 21:53:42,105 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash 508379419, now seen corresponding path program 24 times [2021-06-12 21:53:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:42,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442268938] [2021-06-12 21:53:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:42,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:42,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442268938] [2021-06-12 21:53:42,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442268938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:42,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674893309] [2021-06-12 21:53:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:42,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:53:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:53:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:42,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-06-12 21:53:42,432 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:42,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:42,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-12 21:53:42,466 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:42,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-06-12 21:53:42,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:42,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:42,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:42,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-06-12 21:53:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674893309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:42,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:42,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:53:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422189107] [2021-06-12 21:53:42,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:42,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:42,595 INFO L87 Difference]: Start difference. First operand 1366 states and 4650 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:43,294 INFO L93 Difference]: Finished difference Result 1843 states and 6121 transitions. [2021-06-12 21:53:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:53:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:43,297 INFO L225 Difference]: With dead ends: 1843 [2021-06-12 21:53:43,297 INFO L226 Difference]: Without dead ends: 1824 [2021-06-12 21:53:43,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:53:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-12 21:53:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1378. [2021-06-12 21:53:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-12 21:53:43,314 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-12 21:53:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-12 21:53:43,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-12 21:53:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:43,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:43,316 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:43,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-06-12 21:53:43,518 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1495871031, now seen corresponding path program 25 times [2021-06-12 21:53:43,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:43,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419162557] [2021-06-12 21:53:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:43,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419162557] [2021-06-12 21:53:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419162557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183401533] [2021-06-12 21:53:43,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:53:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:43,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:53:43,835 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:43,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:43,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:53:43,869 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:43,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:53:43,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:43,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:43,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 21:53:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:44,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183401533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:44,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:44,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:53:44,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064300981] [2021-06-12 21:53:44,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:53:44,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:44,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:53:44,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:53:44,006 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:44,568 INFO L93 Difference]: Finished difference Result 1965 states and 6485 transitions. [2021-06-12 21:53:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:53:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:44,571 INFO L225 Difference]: With dead ends: 1965 [2021-06-12 21:53:44,571 INFO L226 Difference]: Without dead ends: 1940 [2021-06-12 21:53:44,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:53:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-12 21:53:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1378. [2021-06-12 21:53:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-12 21:53:44,589 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-12 21:53:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:44,589 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-12 21:53:44,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-12 21:53:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:44,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:44,590 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:44,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:44,791 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1425327497, now seen corresponding path program 42 times [2021-06-12 21:53:44,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:44,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406317937] [2021-06-12 21:53:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:44,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406317937] [2021-06-12 21:53:44,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406317937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47764404] [2021-06-12 21:53:44,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:45,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:53:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:53:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:45,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:53:45,166 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:45,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:45,175 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 37 treesize of output 27 [2021-06-12 21:53:45,177 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:45,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:45,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:45,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:45,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:45,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:45,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:45,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:53:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:45,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47764404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:45,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:45,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:53:45,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676984860] [2021-06-12 21:53:45,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:53:45,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:53:45,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:53:45,212 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:46,116 INFO L93 Difference]: Finished difference Result 1798 states and 5944 transitions. [2021-06-12 21:53:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:53:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:53:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:46,119 INFO L225 Difference]: With dead ends: 1798 [2021-06-12 21:53:46,119 INFO L226 Difference]: Without dead ends: 1772 [2021-06-12 21:53:46,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:53:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-06-12 21:53:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1390. [2021-06-12 21:53:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-12 21:53:46,135 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-12 21:53:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-12 21:53:46,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-12 21:53:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:53:46,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:46,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:46,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:46,337 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -357452933, now seen corresponding path program 43 times [2021-06-12 21:53:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:46,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871014983] [2021-06-12 21:53:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:46,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871014983] [2021-06-12 21:53:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871014983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533630595] [2021-06-12 21:53:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:53:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:48,102 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-12 21:53:48,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:53:48,112 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:48,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,121 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 37 treesize of output 27 [2021-06-12 21:53:48,123 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:48,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:53:48,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:53:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533630595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:48,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:48,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 21:53:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543703929] [2021-06-12 21:53:48,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:53:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:53:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2021-06-12 21:53:48,160 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:12,563 INFO L93 Difference]: Finished difference Result 1985 states and 6572 transitions. [2021-06-12 21:54:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:54:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:12,566 INFO L225 Difference]: With dead ends: 1985 [2021-06-12 21:54:12,566 INFO L226 Difference]: Without dead ends: 1970 [2021-06-12 21:54:12,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 6001.2ms TimeCoverageRelationStatistics Valid=322, Invalid=1312, Unknown=6, NotChecked=0, Total=1640 [2021-06-12 21:54:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-06-12 21:54:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1390. [2021-06-12 21:54:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-12 21:54:12,583 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-12 21:54:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:12,583 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-12 21:54:12,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-12 21:54:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:12,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:12,585 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:12,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-06-12 21:54:12,785 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:12,786 INFO L82 PathProgramCache]: Analyzing trace with hash -945828357, now seen corresponding path program 26 times [2021-06-12 21:54:12,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:12,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799490333] [2021-06-12 21:54:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:12,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799490333] [2021-06-12 21:54:12,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799490333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401513826] [2021-06-12 21:54:12,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:12,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:54:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:13,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:13,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:54:13,133 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:13,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:13,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:13,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:54:13,143 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:13,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:13,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,164 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:54:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:13,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401513826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:13,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:13,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:54:13,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913007875] [2021-06-12 21:54:13,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:54:13,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:54:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:54:13,181 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:54:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:13,949 INFO L93 Difference]: Finished difference Result 1896 states and 6197 transitions. [2021-06-12 21:54:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:54:13,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 21:54:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:13,952 INFO L225 Difference]: With dead ends: 1896 [2021-06-12 21:54:13,952 INFO L226 Difference]: Without dead ends: 1881 [2021-06-12 21:54:13,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:54:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-06-12 21:54:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1401. [2021-06-12 21:54:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.405) internal successors, (4767), 1400 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4767 transitions. [2021-06-12 21:54:13,969 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4767 transitions. Word has length 26 [2021-06-12 21:54:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:13,969 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 4767 transitions. [2021-06-12 21:54:13,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:54:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4767 transitions. [2021-06-12 21:54:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:13,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:13,970 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:14,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:14,171 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash 604553207, now seen corresponding path program 44 times [2021-06-12 21:54:14,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:14,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998832162] [2021-06-12 21:54:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:14,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998832162] [2021-06-12 21:54:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998832162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581096387] [2021-06-12 21:54:14,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:14,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:14,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:54:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:14,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:54:14,712 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:14,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:14,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:54:14,818 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:14,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:54:15,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:15,932 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2021-06-12 21:54:15,932 INFO L628 ElimStorePlain]: treesize reduction 426, result has 80.4 percent of original size [2021-06-12 21:54:16,094 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 149 [2021-06-12 21:54:16,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:16,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:149 [2021-06-12 21:54:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:16,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581096387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:16,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:16,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:54:16,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416599931] [2021-06-12 21:54:16,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:54:16,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:16,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:54:16,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:54:16,384 INFO L87 Difference]: Start difference. First operand 1401 states and 4767 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:18,140 INFO L93 Difference]: Finished difference Result 2295 states and 7289 transitions. [2021-06-12 21:54:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:54:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:18,143 INFO L225 Difference]: With dead ends: 2295 [2021-06-12 21:54:18,143 INFO L226 Difference]: Without dead ends: 2251 [2021-06-12 21:54:18,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1588.5ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:54:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-12 21:54:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1408. [2021-06-12 21:54:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.405828002842928) internal successors, (4792), 1407 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4792 transitions. [2021-06-12 21:54:18,163 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4792 transitions. Word has length 26 [2021-06-12 21:54:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:18,163 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4792 transitions. [2021-06-12 21:54:18,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4792 transitions. [2021-06-12 21:54:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:18,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:18,164 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:18,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-06-12 21:54:18,366 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:18,366 INFO L82 PathProgramCache]: Analyzing trace with hash -371765637, now seen corresponding path program 45 times [2021-06-12 21:54:18,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:18,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511158483] [2021-06-12 21:54:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:18,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:18,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511158483] [2021-06-12 21:54:18,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511158483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:18,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51265786] [2021-06-12 21:54:18,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:18,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:54:18,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:54:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,744 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:54:18,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-12 21:54:18,808 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:18,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,858 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:54:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-12 21:54:19,024 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:19,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:19,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-06-12 21:54:19,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:19,823 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2021-06-12 21:54:19,823 INFO L628 ElimStorePlain]: treesize reduction 242, result has 87.7 percent of original size [2021-06-12 21:54:20,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:20,203 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:232 [2021-06-12 21:54:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51265786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:20,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:20,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:54:20,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43383104] [2021-06-12 21:54:20,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:54:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:54:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:54:20,264 INFO L87 Difference]: Start difference. First operand 1408 states and 4792 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:21,641 INFO L93 Difference]: Finished difference Result 2489 states and 8040 transitions. [2021-06-12 21:54:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:54:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:21,645 INFO L225 Difference]: With dead ends: 2489 [2021-06-12 21:54:21,645 INFO L226 Difference]: Without dead ends: 2474 [2021-06-12 21:54:21,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1209.3ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:54:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-12 21:54:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1418. [2021-06-12 21:54:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.4064925899788285) internal successors, (4827), 1417 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4827 transitions. [2021-06-12 21:54:21,665 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4827 transitions. Word has length 26 [2021-06-12 21:54:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:21,665 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4827 transitions. [2021-06-12 21:54:21,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4827 transitions. [2021-06-12 21:54:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:21,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:21,667 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:21,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:21,867 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash 644042019, now seen corresponding path program 27 times [2021-06-12 21:54:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:21,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052781550] [2021-06-12 21:54:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:22,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:22,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052781550] [2021-06-12 21:54:22,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052781550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016512139] [2021-06-12 21:54:22,042 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:22,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:54:22,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:22,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:54:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:22,220 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 43 treesize of output 35 [2021-06-12 21:54:22,221 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:22,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:22,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:54:22,231 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:22,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:22,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:22,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:22,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:22,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:22,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:22,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:54:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016512139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:54:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223988465] [2021-06-12 21:54:22,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:54:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:54:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:54:22,272 INFO L87 Difference]: Start difference. First operand 1418 states and 4827 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:54:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:23,085 INFO L93 Difference]: Finished difference Result 2009 states and 6538 transitions. [2021-06-12 21:54:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:54:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 21:54:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:23,094 INFO L225 Difference]: With dead ends: 2009 [2021-06-12 21:54:23,095 INFO L226 Difference]: Without dead ends: 1994 [2021-06-12 21:54:23,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:54:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-12 21:54:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1423. [2021-06-12 21:54:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.407876230661041) internal successors, (4846), 1422 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4846 transitions. [2021-06-12 21:54:23,111 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4846 transitions. Word has length 26 [2021-06-12 21:54:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:23,112 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4846 transitions. [2021-06-12 21:54:23,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:54:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4846 transitions. [2021-06-12 21:54:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:23,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:23,113 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:23,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-12 21:54:23,314 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash -973490761, now seen corresponding path program 28 times [2021-06-12 21:54:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:23,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88024587] [2021-06-12 21:54:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:23,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88024587] [2021-06-12 21:54:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88024587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447509128] [2021-06-12 21:54:23,446 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:23,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:54:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:23,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:54:23,600 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:23,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:23,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:54:23,632 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:23,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:54:23,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:23,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:23,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:23,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 21:54:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447509128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:23,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:23,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:54:23,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073365565] [2021-06-12 21:54:23,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:54:23,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:54:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:54:23,776 INFO L87 Difference]: Start difference. First operand 1423 states and 4846 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:24,896 INFO L93 Difference]: Finished difference Result 2401 states and 7734 transitions. [2021-06-12 21:54:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:54:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:24,899 INFO L225 Difference]: With dead ends: 2401 [2021-06-12 21:54:24,899 INFO L226 Difference]: Without dead ends: 2382 [2021-06-12 21:54:24,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:54:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-12 21:54:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1416. [2021-06-12 21:54:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.4063604240282683) internal successors, (4820), 1415 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4820 transitions. [2021-06-12 21:54:24,918 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4820 transitions. Word has length 26 [2021-06-12 21:54:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:24,918 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4820 transitions. [2021-06-12 21:54:24,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4820 transitions. [2021-06-12 21:54:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:24,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:24,920 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:25,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2499,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:25,121 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 830546731, now seen corresponding path program 46 times [2021-06-12 21:54:25,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:25,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241650241] [2021-06-12 21:54:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:25,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241650241] [2021-06-12 21:54:25,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241650241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:25,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636321930] [2021-06-12 21:54:25,282 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:25,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:54:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:25,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:25,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:54:25,425 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:25,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:25,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:25,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:25,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:25,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 21:54:25,436 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:25,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:25,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:25,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:25,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:25,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:25,458 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:54:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:25,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636321930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:25,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:25,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 21:54:25,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986192286] [2021-06-12 21:54:25,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:54:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:54:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:54:25,476 INFO L87 Difference]: Start difference. First operand 1416 states and 4820 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:26,934 INFO L93 Difference]: Finished difference Result 3014 states and 9632 transitions. [2021-06-12 21:54:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:54:26,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:26,942 INFO L225 Difference]: With dead ends: 3014 [2021-06-12 21:54:26,942 INFO L226 Difference]: Without dead ends: 2978 [2021-06-12 21:54:26,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:54:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-06-12 21:54:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1549. [2021-06-12 21:54:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.4237726098191215) internal successors, (5300), 1548 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5300 transitions. [2021-06-12 21:54:26,967 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5300 transitions. Word has length 26 [2021-06-12 21:54:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:26,967 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 5300 transitions. [2021-06-12 21:54:26,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5300 transitions. [2021-06-12 21:54:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:26,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:26,969 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:27,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:27,170 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:27,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1630771913, now seen corresponding path program 47 times [2021-06-12 21:54:27,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:27,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759988894] [2021-06-12 21:54:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:27,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759988894] [2021-06-12 21:54:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759988894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332226727] [2021-06-12 21:54:27,345 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:27,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:54:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:54:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:27,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:27,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-12 21:54:27,568 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:27,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:27,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:27,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:27,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 21:54:27,675 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:27,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:27,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:27,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:54:27,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:28,299 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-12 21:54:28,299 INFO L628 ElimStorePlain]: treesize reduction 248, result has 85.3 percent of original size [2021-06-12 21:54:28,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:28,492 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-12 21:54:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332226727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:28,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:28,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 21:54:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449716952] [2021-06-12 21:54:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:54:28,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:54:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:54:28,541 INFO L87 Difference]: Start difference. First operand 1549 states and 5300 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:30,284 INFO L93 Difference]: Finished difference Result 3396 states and 10730 transitions. [2021-06-12 21:54:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:54:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:30,289 INFO L225 Difference]: With dead ends: 3396 [2021-06-12 21:54:30,289 INFO L226 Difference]: Without dead ends: 3339 [2021-06-12 21:54:30,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1426.0ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:54:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-12 21:54:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1572. [2021-06-12 21:54:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.426479949077021) internal successors, (5383), 1571 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5383 transitions. [2021-06-12 21:54:30,324 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5383 transitions. Word has length 26 [2021-06-12 21:54:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:30,324 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5383 transitions. [2021-06-12 21:54:30,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5383 transitions. [2021-06-12 21:54:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:30,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:30,326 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:30,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-06-12 21:54:30,527 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 219730783, now seen corresponding path program 29 times [2021-06-12 21:54:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:30,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439593038] [2021-06-12 21:54:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:30,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:30,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439593038] [2021-06-12 21:54:30,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439593038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:30,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558310725] [2021-06-12 21:54:30,683 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:30,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:54:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:54:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,895 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 43 treesize of output 35 [2021-06-12 21:54:30,897 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:30,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:30,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:54:30,908 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:30,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:30,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:30,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:30,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:54:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:30,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558310725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:30,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:30,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 21:54:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824108343] [2021-06-12 21:54:30,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:54:30,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:54:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:54:30,949 INFO L87 Difference]: Start difference. First operand 1572 states and 5383 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:31,778 INFO L93 Difference]: Finished difference Result 1983 states and 6657 transitions. [2021-06-12 21:54:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:54:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:31,781 INFO L225 Difference]: With dead ends: 1983 [2021-06-12 21:54:31,781 INFO L226 Difference]: Without dead ends: 1968 [2021-06-12 21:54:31,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:54:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-12 21:54:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1583. [2021-06-12 21:54:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4260429835651074) internal successors, (5420), 1582 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5420 transitions. [2021-06-12 21:54:31,799 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5420 transitions. Word has length 26 [2021-06-12 21:54:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:31,799 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5420 transitions. [2021-06-12 21:54:31,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5420 transitions. [2021-06-12 21:54:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:31,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:31,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:32,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2633,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:32,002 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1397801997, now seen corresponding path program 30 times [2021-06-12 21:54:32,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:32,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579367099] [2021-06-12 21:54:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:32,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:32,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579367099] [2021-06-12 21:54:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579367099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:32,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327756762] [2021-06-12 21:54:32,150 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:54:32,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:54:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:54:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:32,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:54:32,380 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:32,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:54:32,442 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:32,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:54:32,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:32,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:32,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:32,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:165 [2021-06-12 21:54:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327756762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:32,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:32,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 21:54:32,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972480224] [2021-06-12 21:54:32,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:54:32,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:54:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:54:32,713 INFO L87 Difference]: Start difference. First operand 1583 states and 5420 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:34,239 INFO L93 Difference]: Finished difference Result 2815 states and 9082 transitions. [2021-06-12 21:54:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:54:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:34,243 INFO L225 Difference]: With dead ends: 2815 [2021-06-12 21:54:34,243 INFO L226 Difference]: Without dead ends: 2777 [2021-06-12 21:54:34,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:54:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-06-12 21:54:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1586. [2021-06-12 21:54:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.4227129337539433) internal successors, (5425), 1585 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5425 transitions. [2021-06-12 21:54:34,268 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5425 transitions. Word has length 26 [2021-06-12 21:54:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5425 transitions. [2021-06-12 21:54:34,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5425 transitions. [2021-06-12 21:54:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:34,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:34,270 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:34,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-06-12 21:54:34,470 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:34,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1207222395, now seen corresponding path program 31 times [2021-06-12 21:54:34,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:34,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277591740] [2021-06-12 21:54:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:34,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:34,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277591740] [2021-06-12 21:54:34,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277591740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:34,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061781761] [2021-06-12 21:54:34,608 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:54:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:54:34,765 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:34,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:54:34,798 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:34,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:54:34,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:34,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:34,894 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 21:54:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:34,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061781761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:34,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:34,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:54:34,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974115922] [2021-06-12 21:54:34,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:54:34,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:54:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:54:34,930 INFO L87 Difference]: Start difference. First operand 1586 states and 5425 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:35,585 INFO L93 Difference]: Finished difference Result 2234 states and 7413 transitions. [2021-06-12 21:54:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:54:35,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:35,588 INFO L225 Difference]: With dead ends: 2234 [2021-06-12 21:54:35,588 INFO L226 Difference]: Without dead ends: 2209 [2021-06-12 21:54:35,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:54:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-12 21:54:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1580. [2021-06-12 21:54:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4243191893603546) internal successors, (5407), 1579 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5407 transitions. [2021-06-12 21:54:35,607 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5407 transitions. Word has length 26 [2021-06-12 21:54:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:35,607 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5407 transitions. [2021-06-12 21:54:35,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5407 transitions. [2021-06-12 21:54:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:35,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:35,609 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:35,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-12 21:54:35,809 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash -189976303, now seen corresponding path program 48 times [2021-06-12 21:54:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:35,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37937960] [2021-06-12 21:54:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:36,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37937960] [2021-06-12 21:54:36,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37937960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085534186] [2021-06-12 21:54:36,045 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:36,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:54:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:54:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:36,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:36,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:54:36,218 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:36,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:36,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:36,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:36,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:36,227 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 37 treesize of output 27 [2021-06-12 21:54:36,228 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:36,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:36,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:36,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:36,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:36,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:36,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:36,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:54:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085534186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:36,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:36,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:54:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590915538] [2021-06-12 21:54:36,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:54:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:54:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:54:36,262 INFO L87 Difference]: Start difference. First operand 1580 states and 5407 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:37,602 INFO L93 Difference]: Finished difference Result 2036 states and 6741 transitions. [2021-06-12 21:54:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:54:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:54:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:37,605 INFO L225 Difference]: With dead ends: 2036 [2021-06-12 21:54:37,605 INFO L226 Difference]: Without dead ends: 2014 [2021-06-12 21:54:37,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1241.0ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:54:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-12 21:54:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1572. [2021-06-12 21:54:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-12 21:54:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-12 21:54:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-12 21:54:37,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-12 21:54:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:54:37,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:37,627 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:37,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:37,828 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 735517563, now seen corresponding path program 49 times [2021-06-12 21:54:37,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:37,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178612399] [2021-06-12 21:54:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:38,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178612399] [2021-06-12 21:54:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178612399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700105520] [2021-06-12 21:54:38,048 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:54:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:40,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:40,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:40,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:54:40,771 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:40,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:40,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:40,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:40,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:40,780 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 37 treesize of output 27 [2021-06-12 21:54:40,782 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:40,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:40,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:40,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:54:40,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:40,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:40,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:40,803 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:54:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:40,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700105520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:40,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:40,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 21:54:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470344584] [2021-06-12 21:54:40,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:54:40,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:40,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:54:40,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-12 21:54:40,821 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:09,501 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-12 21:55:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:11,591 INFO L93 Difference]: Finished difference Result 2238 states and 7416 transitions. [2021-06-12 21:55:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:55:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:11,594 INFO L225 Difference]: With dead ends: 2238 [2021-06-12 21:55:11,594 INFO L226 Difference]: Without dead ends: 2223 [2021-06-12 21:55:11,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 15172.3ms TimeCoverageRelationStatistics Valid=421, Invalid=1635, Unknown=14, NotChecked=0, Total=2070 [2021-06-12 21:55:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-12 21:55:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1572. [2021-06-12 21:55:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-12 21:55:11,614 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-12 21:55:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:11,614 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-12 21:55:11,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-12 21:55:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:11,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:11,616 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:11,816 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash -442386977, now seen corresponding path program 50 times [2021-06-12 21:55:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487024587] [2021-06-12 21:55:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:12,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:12,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487024587] [2021-06-12 21:55:12,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487024587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:12,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084329767] [2021-06-12 21:55:12,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:12,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:12,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:12,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:55:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:12,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:12,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 73 [2021-06-12 21:55:12,425 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:12,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:12,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:12,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-06-12 21:55:12,639 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:12,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:12,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:55:12,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:55:13,537 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2021-06-12 21:55:13,537 INFO L628 ElimStorePlain]: treesize reduction 666, result has 70.8 percent of original size [2021-06-12 21:55:14,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:55:14,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-06-12 21:55:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:14,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084329767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:14,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:14,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:55:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551068807] [2021-06-12 21:55:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:55:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:55:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:55:14,445 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:17,699 INFO L93 Difference]: Finished difference Result 2935 states and 9380 transitions. [2021-06-12 21:55:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 21:55:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:17,703 INFO L225 Difference]: With dead ends: 2935 [2021-06-12 21:55:17,703 INFO L226 Difference]: Without dead ends: 2873 [2021-06-12 21:55:17,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2721.0ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 21:55:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-12 21:55:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1625. [2021-06-12 21:55:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4224137931034484) internal successors, (5558), 1624 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5558 transitions. [2021-06-12 21:55:17,727 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5558 transitions. Word has length 26 [2021-06-12 21:55:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:17,727 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5558 transitions. [2021-06-12 21:55:17,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5558 transitions. [2021-06-12 21:55:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:17,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:17,729 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:17,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:17,930 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1988624133, now seen corresponding path program 51 times [2021-06-12 21:55:17,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:17,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924008061] [2021-06-12 21:55:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:18,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924008061] [2021-06-12 21:55:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924008061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920484347] [2021-06-12 21:55:18,134 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:18,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:55:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:55:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:18,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:18,349 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 83 [2021-06-12 21:55:18,781 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:18,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:18,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:18,838 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 73 [2021-06-12 21:55:19,191 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:19,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:19,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:19,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:55:19,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:55:20,335 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-06-12 21:55:20,336 INFO L628 ElimStorePlain]: treesize reduction 678, result has 71.9 percent of original size [2021-06-12 21:55:20,911 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 210 [2021-06-12 21:55:21,234 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 278 [2021-06-12 21:55:21,760 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 216 [2021-06-12 21:55:22,954 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2021-06-12 21:55:23,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:55:23,152 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:2790 [2021-06-12 21:55:23,795 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 44 [2021-06-12 21:55:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920484347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:23,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:23,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 21:55:23,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296352085] [2021-06-12 21:55:23,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:55:23,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:55:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:55:23,925 INFO L87 Difference]: Start difference. First operand 1625 states and 5558 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:24,604 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 21:55:26,405 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 21:55:26,880 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-12 21:55:27,446 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-12 21:55:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:27,508 INFO L93 Difference]: Finished difference Result 2782 states and 8999 transitions. [2021-06-12 21:55:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:55:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:27,514 INFO L225 Difference]: With dead ends: 2782 [2021-06-12 21:55:27,514 INFO L226 Difference]: Without dead ends: 2722 [2021-06-12 21:55:27,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3275.5ms TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:55:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-06-12 21:55:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1634. [2021-06-12 21:55:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.425597060624617) internal successors, (5594), 1633 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5594 transitions. [2021-06-12 21:55:27,540 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5594 transitions. Word has length 26 [2021-06-12 21:55:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:27,540 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 5594 transitions. [2021-06-12 21:55:27,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5594 transitions. [2021-06-12 21:55:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:27,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:27,543 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:27,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-12 21:55:27,743 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 521488947, now seen corresponding path program 52 times [2021-06-12 21:55:27,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:27,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706089447] [2021-06-12 21:55:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706089447] [2021-06-12 21:55:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706089447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226859953] [2021-06-12 21:55:27,984 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:28,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:55:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:32,623 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-12 21:55:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:32,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:32,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:32,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:55:32,642 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:32,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:32,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:32,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 21:55:32,653 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:32,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:32,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:55:32,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:32,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:32,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:55:32,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:55:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226859953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:32,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:32,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 21:55:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767892849] [2021-06-12 21:55:32,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:55:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:55:32,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=215, Unknown=3, NotChecked=0, Total=272 [2021-06-12 21:55:32,698 INFO L87 Difference]: Start difference. First operand 1634 states and 5594 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-12 21:55:35,180 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-12 21:55:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:35,271 INFO L93 Difference]: Finished difference Result 2185 states and 7232 transitions. [2021-06-12 21:55:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:55:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-12 21:55:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:35,275 INFO L225 Difference]: With dead ends: 2185 [2021-06-12 21:55:35,275 INFO L226 Difference]: Without dead ends: 2170 [2021-06-12 21:55:35,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6904.6ms TimeCoverageRelationStatistics Valid=350, Invalid=1453, Unknown=3, NotChecked=0, Total=1806 [2021-06-12 21:55:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-12 21:55:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1638. [2021-06-12 21:55:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-12 21:55:35,295 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-12 21:55:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:35,296 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-12 21:55:35,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-12 21:55:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-12 21:55:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:35,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:35,298 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:35,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:35,498 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2074580369, now seen corresponding path program 53 times [2021-06-12 21:55:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:35,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390090774] [2021-06-12 21:55:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:35,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390090774] [2021-06-12 21:55:35,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390090774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612626156] [2021-06-12 21:55:35,700 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:35,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:55:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:55:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:45,961 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 38 [2021-06-12 21:55:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:46,004 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 21:55:46,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 219 [2021-06-12 21:55:46,074 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:46,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:46,125 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 21:55:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 199 [2021-06-12 21:55:46,282 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:55:46,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 181 [2021-06-12 21:55:46,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,127 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-12 21:55:47,128 INFO L628 ElimStorePlain]: treesize reduction 162, result has 92.8 percent of original size [2021-06-12 21:55:48,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:55:48,073 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:315 [2021-06-12 21:55:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:48,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612626156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:48,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:48,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:55:48,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084617433] [2021-06-12 21:55:48,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:55:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:55:48,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=350, Unknown=5, NotChecked=0, Total=420 [2021-06-12 21:55:48,151 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:52,167 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-12 21:57:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:01,398 INFO L93 Difference]: Finished difference Result 2396 states and 7982 transitions. [2021-06-12 21:57:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:57:01,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:01,401 INFO L225 Difference]: With dead ends: 2396 [2021-06-12 21:57:01,402 INFO L226 Difference]: Without dead ends: 2381 [2021-06-12 21:57:01,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 19388.2ms TimeCoverageRelationStatistics Valid=305, Invalid=1580, Unknown=7, NotChecked=0, Total=1892 [2021-06-12 21:57:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-12 21:57:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1638. [2021-06-12 21:57:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-12 21:57:01,434 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-12 21:57:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:01,435 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-12 21:57:01,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-12 21:57:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:01,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:01,437 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:01,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3489 [2021-06-12 21:57:01,637 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1346907209, now seen corresponding path program 54 times [2021-06-12 21:57:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:01,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104043294] [2021-06-12 21:57:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:01,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104043294] [2021-06-12 21:57:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104043294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338150657] [2021-06-12 21:57:01,797 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:01,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:57:01,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:57:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:01,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:57:02,015 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:02,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:02,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:02,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:57:02,128 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:02,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:02,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:57:02,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:03,058 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2021-06-12 21:57:03,058 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 46.5 percent of original size [2021-06-12 21:57:03,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:03,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 21:57:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338150657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-12 21:57:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408578939] [2021-06-12 21:57:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:03,316 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:05,198 INFO L93 Difference]: Finished difference Result 3261 states and 10301 transitions. [2021-06-12 21:57:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:57:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:05,204 INFO L225 Difference]: With dead ends: 3261 [2021-06-12 21:57:05,204 INFO L226 Difference]: Without dead ends: 3214 [2021-06-12 21:57:05,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1394.4ms TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:57:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-12 21:57:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1647. [2021-06-12 21:57:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.4264884568651275) internal successors, (5640), 1646 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5640 transitions. [2021-06-12 21:57:05,232 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5640 transitions. Word has length 26 [2021-06-12 21:57:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:05,232 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5640 transitions. [2021-06-12 21:57:05,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5640 transitions. [2021-06-12 21:57:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:05,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:05,234 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:05,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:05,437 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -916217703, now seen corresponding path program 55 times [2021-06-12 21:57:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636516483] [2021-06-12 21:57:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:05,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636516483] [2021-06-12 21:57:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636516483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146020693] [2021-06-12 21:57:05,706 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:05,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:57:05,911 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:05,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:05,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:05,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:57:06,028 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:06,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:06,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:06,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:57:06,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:06,794 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2021-06-12 21:57:06,795 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 39.4 percent of original size [2021-06-12 21:57:06,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:06,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-12 21:57:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:06,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146020693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:06,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:06,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:57:06,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842951631] [2021-06-12 21:57:06,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:06,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:06,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:06,998 INFO L87 Difference]: Start difference. First operand 1647 states and 5640 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 21:57:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:09,159 INFO L93 Difference]: Finished difference Result 2920 states and 9365 transitions. [2021-06-12 21:57:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:57:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-12 21:57:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:09,163 INFO L225 Difference]: With dead ends: 2920 [2021-06-12 21:57:09,163 INFO L226 Difference]: Without dead ends: 2886 [2021-06-12 21:57:09,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1999.0ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:57:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-06-12 21:57:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1654. [2021-06-12 21:57:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.434966727162734) internal successors, (5678), 1653 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5678 transitions. [2021-06-12 21:57:09,187 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5678 transitions. Word has length 26 [2021-06-12 21:57:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:09,187 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5678 transitions. [2021-06-12 21:57:09,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 21:57:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5678 transitions. [2021-06-12 21:57:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:09,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:09,189 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:09,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-12 21:57:09,389 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1471656619, now seen corresponding path program 32 times [2021-06-12 21:57:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:09,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380744091] [2021-06-12 21:57:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:09,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:09,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380744091] [2021-06-12 21:57:09,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380744091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:09,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583135253] [2021-06-12 21:57:09,489 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:57:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-06-12 21:57:09,673 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:09,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-12 21:57:09,708 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:09,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:09,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:09,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:41 [2021-06-12 21:57:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:09,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583135253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:09,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:09,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 21:57:09,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465443225] [2021-06-12 21:57:09,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:09,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:09,867 INFO L87 Difference]: Start difference. First operand 1654 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:10,752 INFO L93 Difference]: Finished difference Result 2114 states and 7070 transitions. [2021-06-12 21:57:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:57:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:10,756 INFO L225 Difference]: With dead ends: 2114 [2021-06-12 21:57:10,756 INFO L226 Difference]: Without dead ends: 2099 [2021-06-12 21:57:10,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 658.3ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:57:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-12 21:57:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1645. [2021-06-12 21:57:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.431873479318735) internal successors, (5642), 1644 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5642 transitions. [2021-06-12 21:57:10,774 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5642 transitions. Word has length 26 [2021-06-12 21:57:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:10,775 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5642 transitions. [2021-06-12 21:57:10,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5642 transitions. [2021-06-12 21:57:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:10,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:10,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:10,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-06-12 21:57:10,977 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:10,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1471507747, now seen corresponding path program 33 times [2021-06-12 21:57:10,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:10,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048549239] [2021-06-12 21:57:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:11,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:11,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048549239] [2021-06-12 21:57:11,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048549239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:11,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125126701] [2021-06-12 21:57:11,111 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:11,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:57:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:11,321 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 43 treesize of output 35 [2021-06-12 21:57:11,322 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:11,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:11,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:57:11,334 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:11,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:11,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:11,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:57:11,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:11,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:11,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:11,363 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:57:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:11,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125126701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:11,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:11,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092324170] [2021-06-12 21:57:11,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:11,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:11,382 INFO L87 Difference]: Start difference. First operand 1645 states and 5642 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:11,955 INFO L93 Difference]: Finished difference Result 2294 states and 7660 transitions. [2021-06-12 21:57:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:57:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:57:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:11,958 INFO L225 Difference]: With dead ends: 2294 [2021-06-12 21:57:11,958 INFO L226 Difference]: Without dead ends: 2279 [2021-06-12 21:57:11,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:57:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-06-12 21:57:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1647. [2021-06-12 21:57:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.431956257594168) internal successors, (5649), 1646 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5649 transitions. [2021-06-12 21:57:11,978 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5649 transitions. Word has length 26 [2021-06-12 21:57:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:11,978 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5649 transitions. [2021-06-12 21:57:11,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5649 transitions. [2021-06-12 21:57:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:11,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:11,980 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:12,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:12,185 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash -146025033, now seen corresponding path program 34 times [2021-06-12 21:57:12,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:12,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416168084] [2021-06-12 21:57:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416168084] [2021-06-12 21:57:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416168084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:12,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833434310] [2021-06-12 21:57:12,340 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:12,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:57:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:12,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:12,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:57:12,514 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:12,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:12,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:57:12,548 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:12,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:12,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:12,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:12,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:12,640 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 21:57:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:12,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833434310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:12,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:12,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:12,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339736339] [2021-06-12 21:57:12,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:12,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:12,679 INFO L87 Difference]: Start difference. First operand 1647 states and 5649 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:13,477 INFO L93 Difference]: Finished difference Result 2530 states and 8380 transitions. [2021-06-12 21:57:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:57:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:13,481 INFO L225 Difference]: With dead ends: 2530 [2021-06-12 21:57:13,481 INFO L226 Difference]: Without dead ends: 2515 [2021-06-12 21:57:13,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:57:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-12 21:57:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1638. [2021-06-12 21:57:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-12 21:57:13,502 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-12 21:57:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:13,502 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-12 21:57:13,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-12 21:57:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:13,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:13,504 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:13,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:13,717 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -628905925, now seen corresponding path program 35 times [2021-06-12 21:57:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:13,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183795607] [2021-06-12 21:57:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183795607] [2021-06-12 21:57:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183795607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849438563] [2021-06-12 21:57:13,846 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:13,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:57:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:14,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:14,035 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 43 treesize of output 35 [2021-06-12 21:57:14,036 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:14,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:14,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:14,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:57:14,048 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:14,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:14,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:14,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:57:14,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:14,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:14,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:14,071 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:57:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849438563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:14,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:14,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814987459] [2021-06-12 21:57:14,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:14,084 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:14,476 INFO L93 Difference]: Finished difference Result 2064 states and 6895 transitions. [2021-06-12 21:57:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:57:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:14,480 INFO L225 Difference]: With dead ends: 2064 [2021-06-12 21:57:14,480 INFO L226 Difference]: Without dead ends: 2043 [2021-06-12 21:57:14,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:57:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-06-12 21:57:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1638. [2021-06-12 21:57:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-12 21:57:14,505 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-12 21:57:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:14,506 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-12 21:57:14,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-12 21:57:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:14,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:14,508 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:14,721 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2009149475, now seen corresponding path program 36 times [2021-06-12 21:57:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746620816] [2021-06-12 21:57:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:14,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:14,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746620816] [2021-06-12 21:57:14,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746620816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:14,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917359734] [2021-06-12 21:57:14,845 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:14,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:57:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:57:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:15,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:57:15,085 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:15,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:15,161 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:15,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:15,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:15,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:57:15,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:173 [2021-06-12 21:57:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:15,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917359734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:15,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:15,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 21:57:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918631687] [2021-06-12 21:57:15,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:15,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:15,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:15,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:15,405 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:19,814 INFO L93 Difference]: Finished difference Result 2222 states and 7252 transitions. [2021-06-12 21:57:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:57:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:57:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:19,817 INFO L225 Difference]: With dead ends: 2222 [2021-06-12 21:57:19,817 INFO L226 Difference]: Without dead ends: 2184 [2021-06-12 21:57:19,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 879.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:57:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-12 21:57:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1632. [2021-06-12 21:57:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.4267320662170446) internal successors, (5589), 1631 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5589 transitions. [2021-06-12 21:57:19,835 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5589 transitions. Word has length 26 [2021-06-12 21:57:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5589 transitions. [2021-06-12 21:57:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5589 transitions. [2021-06-12 21:57:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:19,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:19,837 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:20,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-12 21:57:20,037 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -816683043, now seen corresponding path program 37 times [2021-06-12 21:57:20,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:20,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785803067] [2021-06-12 21:57:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:20,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:20,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785803067] [2021-06-12 21:57:20,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785803067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:20,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152127303] [2021-06-12 21:57:20,157 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:20,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:20,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:57:20,317 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:20,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:20,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:57:20,353 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:20,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:20,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:20,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:20,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:20,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:57:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152127303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:20,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:20,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 21:57:20,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296540030] [2021-06-12 21:57:20,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:57:20,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:57:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:57:20,485 INFO L87 Difference]: Start difference. First operand 1632 states and 5589 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:20,818 INFO L93 Difference]: Finished difference Result 2129 states and 7065 transitions. [2021-06-12 21:57:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:57:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:20,822 INFO L225 Difference]: With dead ends: 2129 [2021-06-12 21:57:20,822 INFO L226 Difference]: Without dead ends: 2104 [2021-06-12 21:57:20,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:57:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-12 21:57:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1626. [2021-06-12 21:57:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.420923076923077) internal successors, (5559), 1625 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5559 transitions. [2021-06-12 21:57:20,841 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5559 transitions. Word has length 26 [2021-06-12 21:57:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:20,841 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5559 transitions. [2021-06-12 21:57:20,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5559 transitions. [2021-06-12 21:57:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:20,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:20,843 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:21,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:21,044 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1649350967, now seen corresponding path program 38 times [2021-06-12 21:57:21,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:21,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787203141] [2021-06-12 21:57:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:21,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787203141] [2021-06-12 21:57:21,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787203141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693760229] [2021-06-12 21:57:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:57:21,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:57:21,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:21,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:57:21,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:21,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:21,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-12 21:57:21,363 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:21,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:57:21,374 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:21,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:21,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:57:21,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:21,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:21,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:21,400 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:57:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693760229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 21:57:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116771973] [2021-06-12 21:57:21,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:57:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:57:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:57:21,419 INFO L87 Difference]: Start difference. First operand 1626 states and 5559 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:57:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:21,568 INFO L93 Difference]: Finished difference Result 1701 states and 5724 transitions. [2021-06-12 21:57:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:57:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 21:57:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:21,571 INFO L225 Difference]: With dead ends: 1701 [2021-06-12 21:57:21,571 INFO L226 Difference]: Without dead ends: 1682 [2021-06-12 21:57:21,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-12 21:57:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1618. [2021-06-12 21:57:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.419294990723562) internal successors, (5529), 1617 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5529 transitions. [2021-06-12 21:57:21,588 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5529 transitions. Word has length 26 [2021-06-12 21:57:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:21,588 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5529 transitions. [2021-06-12 21:57:21,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 21:57:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5529 transitions. [2021-06-12 21:57:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:21,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:21,590 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:21,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-12 21:57:21,791 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -497941569, now seen corresponding path program 39 times [2021-06-12 21:57:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:21,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385148417] [2021-06-12 21:57:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:21,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385148417] [2021-06-12 21:57:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385148417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809627778] [2021-06-12 21:57:21,938 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:21,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:57:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:23,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:57:23,191 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:23,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:23,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:23,260 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:23,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:23,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:23,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:23,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:57:23,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:154 [2021-06-12 21:57:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809627778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:23,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:23,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 21:57:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717459323] [2021-06-12 21:57:23,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-12 21:57:23,518 INFO L87 Difference]: Start difference. First operand 1618 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:36,890 INFO L93 Difference]: Finished difference Result 1845 states and 6184 transitions. [2021-06-12 21:57:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:57:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:36,893 INFO L225 Difference]: With dead ends: 1845 [2021-06-12 21:57:36,893 INFO L226 Difference]: Without dead ends: 1820 [2021-06-12 21:57:36,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5135.3ms TimeCoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2021-06-12 21:57:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-06-12 21:57:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1600. [2021-06-12 21:57:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.424015009380863) internal successors, (5475), 1599 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5475 transitions. [2021-06-12 21:57:36,910 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5475 transitions. Word has length 26 [2021-06-12 21:57:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:36,911 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5475 transitions. [2021-06-12 21:57:36,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5475 transitions. [2021-06-12 21:57:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:36,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:36,913 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:37,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-12 21:57:37,113 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1031976481, now seen corresponding path program 40 times [2021-06-12 21:57:37,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:37,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622033392] [2021-06-12 21:57:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:37,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:37,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622033392] [2021-06-12 21:57:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622033392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:37,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199455688] [2021-06-12 21:57:37,244 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:37,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:57:37,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:37,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:37,457 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 43 treesize of output 35 [2021-06-12 21:57:37,458 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:37,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:37,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:57:37,470 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:37,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:37,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:37,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:57:37,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:37,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:37,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:37,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:57:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199455688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:37,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:37,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562248442] [2021-06-12 21:57:37,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:37,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:37,513 INFO L87 Difference]: Start difference. First operand 1600 states and 5475 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:38,018 INFO L93 Difference]: Finished difference Result 2102 states and 6991 transitions. [2021-06-12 21:57:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:57:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:57:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:38,021 INFO L225 Difference]: With dead ends: 2102 [2021-06-12 21:57:38,021 INFO L226 Difference]: Without dead ends: 2087 [2021-06-12 21:57:38,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:57:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-12 21:57:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1595. [2021-06-12 21:57:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.422835633626098) internal successors, (5456), 1594 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5456 transitions. [2021-06-12 21:57:38,063 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5456 transitions. Word has length 26 [2021-06-12 21:57:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:38,063 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5456 transitions. [2021-06-12 21:57:38,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5456 transitions. [2021-06-12 21:57:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:38,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:38,071 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:38,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-06-12 21:57:38,281 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -44484869, now seen corresponding path program 41 times [2021-06-12 21:57:38,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:38,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062819793] [2021-06-12 21:57:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:38,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062819793] [2021-06-12 21:57:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062819793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328421292] [2021-06-12 21:57:38,388 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:38,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:57:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:38,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:38,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:41,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:57:41,501 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:41,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:41,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:57:41,536 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:41,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:41,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:41,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:41,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-12 21:57:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328421292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:41,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:41,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 21:57:41,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643415789] [2021-06-12 21:57:41,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:41,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:41,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=272, Unknown=2, NotChecked=0, Total=342 [2021-06-12 21:57:41,668 INFO L87 Difference]: Start difference. First operand 1595 states and 5456 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:57:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:53,419 INFO L93 Difference]: Finished difference Result 2234 states and 7411 transitions. [2021-06-12 21:57:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:57:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-12 21:57:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:53,422 INFO L225 Difference]: With dead ends: 2234 [2021-06-12 21:57:53,422 INFO L226 Difference]: Without dead ends: 2209 [2021-06-12 21:57:53,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3408.9ms TimeCoverageRelationStatistics Valid=199, Invalid=855, Unknown=2, NotChecked=0, Total=1056 [2021-06-12 21:57:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-12 21:57:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1573. [2021-06-12 21:57:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.422391857506361) internal successors, (5380), 1572 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5380 transitions. [2021-06-12 21:57:53,440 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5380 transitions. Word has length 26 [2021-06-12 21:57:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:53,440 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5380 transitions. [2021-06-12 21:57:53,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:57:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5380 transitions. [2021-06-12 21:57:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:53,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:53,442 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:53,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-12 21:57:53,643 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -987079049, now seen corresponding path program 42 times [2021-06-12 21:57:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:53,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539689740] [2021-06-12 21:57:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:53,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:53,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539689740] [2021-06-12 21:57:53,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539689740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:53,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564878269] [2021-06-12 21:57:53,746 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:53,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:57:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:53,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:53,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:57:53,954 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:53,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:53,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:54,038 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:54,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:54,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:54,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:54,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:54,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:54,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:116 [2021-06-12 21:57:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:54,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564878269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:54,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:54,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 21:57:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385966724] [2021-06-12 21:57:54,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:54,268 INFO L87 Difference]: Start difference. First operand 1573 states and 5380 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:54,771 INFO L93 Difference]: Finished difference Result 2054 states and 6859 transitions. [2021-06-12 21:57:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:57:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:54,774 INFO L225 Difference]: With dead ends: 2054 [2021-06-12 21:57:54,774 INFO L226 Difference]: Without dead ends: 2039 [2021-06-12 21:57:54,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:57:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-12 21:57:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1618. [2021-06-12 21:57:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.4162028447742734) internal successors, (5524), 1617 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5524 transitions. [2021-06-12 21:57:54,791 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5524 transitions. Word has length 26 [2021-06-12 21:57:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:54,792 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5524 transitions. [2021-06-12 21:57:54,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5524 transitions. [2021-06-12 21:57:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:54,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:54,793 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:54,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-12 21:57:54,994 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1154888141, now seen corresponding path program 43 times [2021-06-12 21:57:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:54,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337659187] [2021-06-12 21:57:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:55,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337659187] [2021-06-12 21:57:55,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337659187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007305973] [2021-06-12 21:57:55,101 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:55,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:55,264 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 43 treesize of output 35 [2021-06-12 21:57:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:55,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:55,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:57:55,277 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:55,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:55,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:55,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:57:55,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:55,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:55,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:57:55,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:57:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007305973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:55,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:55,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:57:55,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154144868] [2021-06-12 21:57:55,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:55,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:55,319 INFO L87 Difference]: Start difference. First operand 1618 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:55,928 INFO L93 Difference]: Finished difference Result 2315 states and 7658 transitions. [2021-06-12 21:57:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:57:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:55,931 INFO L225 Difference]: With dead ends: 2315 [2021-06-12 21:57:55,931 INFO L226 Difference]: Without dead ends: 2300 [2021-06-12 21:57:55,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:57:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-12 21:57:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1619. [2021-06-12 21:57:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.417799752781211) internal successors, (5530), 1618 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5530 transitions. [2021-06-12 21:57:55,951 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5530 transitions. Word has length 26 [2021-06-12 21:57:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:55,952 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 5530 transitions. [2021-06-12 21:57:55,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5530 transitions. [2021-06-12 21:57:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:55,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:55,953 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:56,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:56,154 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash -856114693, now seen corresponding path program 44 times [2021-06-12 21:57:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:56,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335456500] [2021-06-12 21:57:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:56,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335456500] [2021-06-12 21:57:56,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335456500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835343201] [2021-06-12 21:57:56,259 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:56,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:57:56,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:57:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:56,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:57:56,466 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:56,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:56,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:56,534 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:56,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:56,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:56,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:56,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:57:56,708 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:97 [2021-06-12 21:57:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:56,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835343201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:56,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:56,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:56,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876608626] [2021-06-12 21:57:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:56,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:56,775 INFO L87 Difference]: Start difference. First operand 1619 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:57,151 INFO L93 Difference]: Finished difference Result 2120 states and 7093 transitions. [2021-06-12 21:57:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:57:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:57:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:57,154 INFO L225 Difference]: With dead ends: 2120 [2021-06-12 21:57:57,154 INFO L226 Difference]: Without dead ends: 2105 [2021-06-12 21:57:57,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:57:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-12 21:57:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1622. [2021-06-12 21:57:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.421344848858729) internal successors, (5546), 1621 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5546 transitions. [2021-06-12 21:57:57,172 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5546 transitions. Word has length 26 [2021-06-12 21:57:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:57,172 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5546 transitions. [2021-06-12 21:57:57,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:57:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5546 transitions. [2021-06-12 21:57:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:57,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:57,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:57,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-06-12 21:57:57,375 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1488441339, now seen corresponding path program 45 times [2021-06-12 21:57:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:57,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570401074] [2021-06-12 21:57:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:57,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570401074] [2021-06-12 21:57:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570401074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221014577] [2021-06-12 21:57:57,472 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:57,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:57,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:57:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:57:58,552 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:58,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:58,615 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:57:58,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:57:58,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:57:58,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:57:58,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:229 [2021-06-12 21:57:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221014577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:58,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:58,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028086430] [2021-06-12 21:57:58,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:58,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:58,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:58,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2021-06-12 21:57:58,881 INFO L87 Difference]: Start difference. First operand 1622 states and 5546 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:58:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:06,475 INFO L93 Difference]: Finished difference Result 2150 states and 7189 transitions. [2021-06-12 21:58:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:58:06,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:58:06,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:06,478 INFO L225 Difference]: With dead ends: 2150 [2021-06-12 21:58:06,478 INFO L226 Difference]: Without dead ends: 2135 [2021-06-12 21:58:06,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1267.7ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-06-12 21:58:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-12 21:58:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1640. [2021-06-12 21:58:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.416717510677242) internal successors, (5600), 1639 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5600 transitions. [2021-06-12 21:58:06,497 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5600 transitions. Word has length 26 [2021-06-12 21:58:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:06,497 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5600 transitions. [2021-06-12 21:58:06,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:58:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5600 transitions. [2021-06-12 21:58:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:06,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:06,499 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:06,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:06,699 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:06,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2007184673, now seen corresponding path program 46 times [2021-06-12 21:58:06,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:06,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70187927] [2021-06-12 21:58:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:06,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70187927] [2021-06-12 21:58:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70187927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053103584] [2021-06-12 21:58:06,832 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:06,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:58:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:07,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:07,031 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 43 treesize of output 35 [2021-06-12 21:58:07,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:07,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:07,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:07,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 21:58:07,045 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:07,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:07,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:58:07,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:07,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:07,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:07,067 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:58:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:07,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053103584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:07,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:07,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:58:07,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890693823] [2021-06-12 21:58:07,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:58:07,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:58:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:58:07,082 INFO L87 Difference]: Start difference. First operand 1640 states and 5600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:58:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:07,619 INFO L93 Difference]: Finished difference Result 2076 states and 6950 transitions. [2021-06-12 21:58:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:58:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 21:58:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:07,622 INFO L225 Difference]: With dead ends: 2076 [2021-06-12 21:58:07,623 INFO L226 Difference]: Without dead ends: 2061 [2021-06-12 21:58:07,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:58:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-12 21:58:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1661. [2021-06-12 21:58:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-06-12 21:58:07,641 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-06-12 21:58:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:07,641 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-06-12 21:58:07,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 21:58:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-06-12 21:58:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:07,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:07,643 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:07,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:07,845 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash 670249843, now seen corresponding path program 47 times [2021-06-12 21:58:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:07,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794876079] [2021-06-12 21:58:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:07,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794876079] [2021-06-12 21:58:07,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794876079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831622301] [2021-06-12 21:58:07,993 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:08,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:58:08,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:58:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:08,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:58:08,219 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:08,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:08,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:58:08,252 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:08,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:58:08,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:58:08,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:08,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:08,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-12 21:58:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:08,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831622301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:08,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:08,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 21:58:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046225112] [2021-06-12 21:58:08,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:58:08,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:58:08,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:58:08,404 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:58:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:09,018 INFO L93 Difference]: Finished difference Result 2366 states and 7851 transitions. [2021-06-12 21:58:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:58:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-12 21:58:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:09,022 INFO L225 Difference]: With dead ends: 2366 [2021-06-12 21:58:09,022 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 21:58:09,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:58:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 21:58:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1658. [2021-06-12 21:58:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4140012070006036) internal successors, (5657), 1657 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5657 transitions. [2021-06-12 21:58:09,044 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5657 transitions. Word has length 26 [2021-06-12 21:58:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:09,044 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5657 transitions. [2021-06-12 21:58:09,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-12 21:58:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5657 transitions. [2021-06-12 21:58:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:09,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:09,046 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:09,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4434,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:09,247 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693061, now seen corresponding path program 48 times [2021-06-12 21:58:09,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:09,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955366323] [2021-06-12 21:58:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:09,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955366323] [2021-06-12 21:58:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955366323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780674262] [2021-06-12 21:58:09,345 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:09,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:58:09,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:58:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:09,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:58:09,495 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:09,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:58:09,526 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:09,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:58:09,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:58:09,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:09,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,606 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:58:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:09,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780674262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:09,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:09,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:58:09,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035079019] [2021-06-12 21:58:09,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:58:09,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:09,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:58:09,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:58:09,643 INFO L87 Difference]: Start difference. First operand 1658 states and 5657 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:10,098 INFO L93 Difference]: Finished difference Result 2228 states and 7412 transitions. [2021-06-12 21:58:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:58:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:10,101 INFO L225 Difference]: With dead ends: 2228 [2021-06-12 21:58:10,101 INFO L226 Difference]: Without dead ends: 2203 [2021-06-12 21:58:10,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:58:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-12 21:58:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1658. [2021-06-12 21:58:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-12 21:58:10,120 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-12 21:58:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:10,120 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-12 21:58:10,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-12 21:58:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:10,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:10,122 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:10,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-12 21:58:10,325 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1464847671, now seen corresponding path program 49 times [2021-06-12 21:58:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:10,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34242745] [2021-06-12 21:58:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:10,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34242745] [2021-06-12 21:58:10,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34242745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175590070] [2021-06-12 21:58:10,430 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:12,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:58:12,129 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:12,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:12,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:58:12,163 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:12,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:58:12,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:58:12,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:12,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:12,253 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-12 21:58:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:12,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175590070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:12,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:12,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:58:12,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560367745] [2021-06-12 21:58:12,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:58:12,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:58:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2021-06-12 21:58:12,290 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:13,638 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-12 21:58:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:13,765 INFO L93 Difference]: Finished difference Result 2151 states and 7200 transitions. [2021-06-12 21:58:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:58:13,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:13,768 INFO L225 Difference]: With dead ends: 2151 [2021-06-12 21:58:13,768 INFO L226 Difference]: Without dead ends: 2136 [2021-06-12 21:58:13,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2969.3ms TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2021-06-12 21:58:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-12 21:58:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1658. [2021-06-12 21:58:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-12 21:58:13,787 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-12 21:58:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:13,787 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-12 21:58:13,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-12 21:58:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:13,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:13,789 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:13,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-12 21:58:13,991 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1829221231, now seen corresponding path program 56 times [2021-06-12 21:58:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:13,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907902868] [2021-06-12 21:58:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:14,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907902868] [2021-06-12 21:58:14,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907902868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803688810] [2021-06-12 21:58:14,155 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:14,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:58:14,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:58:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:14,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:58:14,293 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:14,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:14,305 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 37 treesize of output 27 [2021-06-12 21:58:14,306 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:14,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:14,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:14,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:58:14,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:14,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:14,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:14,333 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:10 [2021-06-12 21:58:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803688810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:14,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:14,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:58:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963230149] [2021-06-12 21:58:14,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:58:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:58:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:58:14,363 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:14,822 INFO L93 Difference]: Finished difference Result 2204 states and 7221 transitions. [2021-06-12 21:58:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:58:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:14,825 INFO L225 Difference]: With dead ends: 2204 [2021-06-12 21:58:14,825 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 21:58:14,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:58:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 21:58:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1676. [2021-06-12 21:58:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.4077611940298507) internal successors, (5708), 1675 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5708 transitions. [2021-06-12 21:58:14,843 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5708 transitions. Word has length 26 [2021-06-12 21:58:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:14,843 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5708 transitions. [2021-06-12 21:58:14,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5708 transitions. [2021-06-12 21:58:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:14,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:14,845 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:15,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:15,045 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash 554911219, now seen corresponding path program 57 times [2021-06-12 21:58:15,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:15,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948445847] [2021-06-12 21:58:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:15,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948445847] [2021-06-12 21:58:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948445847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530181795] [2021-06-12 21:58:15,214 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:15,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:58:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:17,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:17,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:17,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-06-12 21:58:17,448 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:17,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:17,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-12 21:58:17,554 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:58:17,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:17,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:17,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:58:17,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:58:18,451 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-06-12 21:58:18,452 INFO L628 ElimStorePlain]: treesize reduction 632, result has 68.1 percent of original size [2021-06-12 21:58:18,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:58:18,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:63 [2021-06-12 21:58:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530181795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:18,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:18,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:58:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677995572] [2021-06-12 21:58:18,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:58:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:58:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-06-12 21:58:18,796 INFO L87 Difference]: Start difference. First operand 1676 states and 5708 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:25,084 INFO L93 Difference]: Finished difference Result 2373 states and 7814 transitions. [2021-06-12 21:59:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:59:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:25,087 INFO L225 Difference]: With dead ends: 2373 [2021-06-12 21:59:25,087 INFO L226 Difference]: Without dead ends: 2358 [2021-06-12 21:59:25,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 23714.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1790, Unknown=12, NotChecked=0, Total=2162 [2021-06-12 21:59:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-06-12 21:59:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1672. [2021-06-12 21:59:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.40754039497307) internal successors, (5694), 1671 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5694 transitions. [2021-06-12 21:59:25,107 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5694 transitions. Word has length 26 [2021-06-12 21:59:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:25,107 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5694 transitions. [2021-06-12 21:59:25,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5694 transitions. [2021-06-12 21:59:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:25,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:25,109 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:25,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4490,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:25,310 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1130156151, now seen corresponding path program 58 times [2021-06-12 21:59:25,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:25,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884274486] [2021-06-12 21:59:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:25,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884274486] [2021-06-12 21:59:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884274486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337008644] [2021-06-12 21:59:25,431 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:25,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:59:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:59:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:25,625 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:59:25,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-12 21:59:25,688 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:25,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:25,740 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:59:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-12 21:59:25,878 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:25,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:25,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-06-12 21:59:26,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:26,651 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-06-12 21:59:26,651 INFO L628 ElimStorePlain]: treesize reduction 178, result has 90.9 percent of original size [2021-06-12 21:59:26,835 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 148 [2021-06-12 21:59:27,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:27,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:242, output treesize:27 [2021-06-12 21:59:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337008644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:27,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:59:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295284022] [2021-06-12 21:59:27,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:59:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:59:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:59:27,090 INFO L87 Difference]: Start difference. First operand 1672 states and 5694 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:27,796 INFO L93 Difference]: Finished difference Result 2003 states and 6539 transitions. [2021-06-12 21:59:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:59:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:27,799 INFO L225 Difference]: With dead ends: 2003 [2021-06-12 21:59:27,799 INFO L226 Difference]: Without dead ends: 1981 [2021-06-12 21:59:27,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:59:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-06-12 21:59:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1674. [2021-06-12 21:59:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4076509264793784) internal successors, (5701), 1673 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5701 transitions. [2021-06-12 21:59:27,819 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5701 transitions. Word has length 26 [2021-06-12 21:59:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:27,819 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5701 transitions. [2021-06-12 21:59:27,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5701 transitions. [2021-06-12 21:59:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:27,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:27,821 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:28,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4602,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:28,021 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2096936581, now seen corresponding path program 59 times [2021-06-12 21:59:28,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:28,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721753058] [2021-06-12 21:59:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:28,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:28,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721753058] [2021-06-12 21:59:28,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721753058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:28,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566410612] [2021-06-12 21:59:28,173 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:28,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:59:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:30,329 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-12 21:59:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:59:30,340 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:30,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:30,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:30,350 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 37 treesize of output 27 [2021-06-12 21:59:30,352 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:30,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:59:30,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,373 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:59:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:30,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566410612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:30,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:30,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-12 21:59:30,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174862213] [2021-06-12 21:59:30,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:59:30,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:59:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2021-06-12 21:59:30,391 INFO L87 Difference]: Start difference. First operand 1674 states and 5701 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:34,118 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 21:59:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:37,027 INFO L93 Difference]: Finished difference Result 2047 states and 6837 transitions. [2021-06-12 21:59:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:59:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:37,030 INFO L225 Difference]: With dead ends: 2047 [2021-06-12 21:59:37,030 INFO L226 Difference]: Without dead ends: 2016 [2021-06-12 21:59:37,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3295.6ms TimeCoverageRelationStatistics Valid=152, Invalid=549, Unknown=1, NotChecked=0, Total=702 [2021-06-12 21:59:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-12 21:59:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1680. [2021-06-12 21:59:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-12 21:59:37,048 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-12 21:59:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:37,048 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-12 21:59:37,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-12 21:59:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:37,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:37,050 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:37,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4721,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:37,250 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash 540764283, now seen corresponding path program 60 times [2021-06-12 21:59:37,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:37,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768899530] [2021-06-12 21:59:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:37,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:37,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768899530] [2021-06-12 21:59:37,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768899530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:37,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213725653] [2021-06-12 21:59:37,378 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:37,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:59:37,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:59:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:40,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 21:59:40,516 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:40,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:40,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 21:59:40,528 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:40,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:40,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 21:59:40,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:40,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:40,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:40,550 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:59:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:40,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213725653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:40,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:40,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 21:59:40,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501274115] [2021-06-12 21:59:40,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:59:40,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:59:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-12 21:59:40,567 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:48,941 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 21:59:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:51,583 INFO L93 Difference]: Finished difference Result 2079 states and 6921 transitions. [2021-06-12 21:59:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:59:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:51,586 INFO L225 Difference]: With dead ends: 2079 [2021-06-12 21:59:51,586 INFO L226 Difference]: Without dead ends: 2064 [2021-06-12 21:59:51,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7093.5ms TimeCoverageRelationStatistics Valid=158, Invalid=592, Unknown=6, NotChecked=0, Total=756 [2021-06-12 21:59:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-12 21:59:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1680. [2021-06-12 21:59:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-12 21:59:51,605 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-12 21:59:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-12 21:59:51,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-12 21:59:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:51,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:51,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4722 [2021-06-12 21:59:51,808 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1112511237, now seen corresponding path program 50 times [2021-06-12 21:59:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:51,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697588084] [2021-06-12 21:59:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:52,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:52,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697588084] [2021-06-12 21:59:52,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697588084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:52,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154872596] [2021-06-12 21:59:52,000 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:52,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:59:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:59:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:52,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:59:52,143 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:52,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:52,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:59:52,175 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:52,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 21:59:52,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:59:52,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:52,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:52,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:59:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:52,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154872596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:52,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:52,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 21:59:52,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474026535] [2021-06-12 21:59:52,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:59:52,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:59:52,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:59:52,306 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:53,490 INFO L93 Difference]: Finished difference Result 2348 states and 7703 transitions. [2021-06-12 21:59:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:59:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:53,493 INFO L225 Difference]: With dead ends: 2348 [2021-06-12 21:59:53,493 INFO L226 Difference]: Without dead ends: 2333 [2021-06-12 21:59:53,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:59:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-12 21:59:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1687. [2021-06-12 21:59:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.4056939501779357) internal successors, (5742), 1686 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5742 transitions. [2021-06-12 21:59:53,514 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5742 transitions. Word has length 26 [2021-06-12 21:59:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:53,514 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5742 transitions. [2021-06-12 21:59:53,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5742 transitions. [2021-06-12 21:59:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:53,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:53,516 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:53,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:53,716 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash 437870327, now seen corresponding path program 61 times [2021-06-12 21:59:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:53,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545386634] [2021-06-12 21:59:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:53,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545386634] [2021-06-12 21:59:53,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545386634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965619488] [2021-06-12 21:59:53,820 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:59:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:54,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:54,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:59:54,127 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:54,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:54,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:54,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:59:54,242 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:54,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:54,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:54,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:59:54,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:59:54,869 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-06-12 21:59:54,869 INFO L628 ElimStorePlain]: treesize reduction 120, result has 92.5 percent of original size [2021-06-12 21:59:55,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:55,230 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:98 [2021-06-12 21:59:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965619488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:55,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:55,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:59:55,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897348264] [2021-06-12 21:59:55,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:55,264 INFO L87 Difference]: Start difference. First operand 1687 states and 5742 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:56,947 INFO L93 Difference]: Finished difference Result 2521 states and 7986 transitions. [2021-06-12 21:59:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:59:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:56,951 INFO L225 Difference]: With dead ends: 2521 [2021-06-12 21:59:56,951 INFO L226 Difference]: Without dead ends: 2484 [2021-06-12 21:59:56,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1218.5ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:59:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-12 21:59:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1718. [2021-06-12 21:59:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4111822947000583) internal successors, (5857), 1717 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5857 transitions. [2021-06-12 21:59:56,974 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5857 transitions. Word has length 26 [2021-06-12 21:59:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:56,974 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5857 transitions. [2021-06-12 21:59:56,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5857 transitions. [2021-06-12 21:59:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:56,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:56,976 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:57,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:57,181 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash 663863851, now seen corresponding path program 62 times [2021-06-12 21:59:57,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:57,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984804145] [2021-06-12 21:59:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:57,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:57,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984804145] [2021-06-12 21:59:57,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984804145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:57,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174014256] [2021-06-12 21:59:57,294 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:57,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:59:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:57,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:59:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:57,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:57,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-12 21:59:57,522 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:57,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:57,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:57,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-12 21:59:57,631 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 21:59:57,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:57,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:57,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 21:59:57,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:59:58,371 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123 [2021-06-12 21:59:58,371 INFO L628 ElimStorePlain]: treesize reduction 260, result has 86.7 percent of original size [2021-06-12 21:59:58,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:59:58,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:149 [2021-06-12 21:59:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:58,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174014256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:58,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:58,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:59:58,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586075332] [2021-06-12 21:59:58,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:59:58,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:59:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:59:58,961 INFO L87 Difference]: Start difference. First operand 1718 states and 5857 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:59,831 INFO L93 Difference]: Finished difference Result 2981 states and 9498 transitions. [2021-06-12 21:59:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:59:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:59,836 INFO L225 Difference]: With dead ends: 2981 [2021-06-12 21:59:59,836 INFO L226 Difference]: Without dead ends: 2944 [2021-06-12 21:59:59,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:59:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-12 21:59:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1737. [2021-06-12 21:59:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.4164746543778803) internal successors, (5931), 1736 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5931 transitions. [2021-06-12 21:59:59,861 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5931 transitions. Word has length 26 [2021-06-12 21:59:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:59,861 INFO L482 AbstractCegarLoop]: Abstraction has 1737 states and 5931 transitions. [2021-06-12 21:59:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5931 transitions. [2021-06-12 21:59:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:59,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:59,863 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:00,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-06-12 22:00:00,065 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 53047903, now seen corresponding path program 51 times [2021-06-12 22:00:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:00,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031261246] [2021-06-12 22:00:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:00,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031261246] [2021-06-12 22:00:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031261246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343670341] [2021-06-12 22:00:00,205 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:00,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:00:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:00:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:03,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-12 22:00:03,469 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:00:03,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:00:03,622 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:00:03,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:00:03,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:00:03,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:03,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2021-06-12 22:00:03,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:349 [2021-06-12 22:00:04,050 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-12 22:00:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:04,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343670341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:04,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:04,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:00:04,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787780148] [2021-06-12 22:00:04,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:00:04,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:04,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:00:04,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=250, Unknown=2, NotChecked=0, Total=306 [2021-06-12 22:00:04,074 INFO L87 Difference]: Start difference. First operand 1737 states and 5931 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:34,092 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 22:00:38,399 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-12 22:00:42,187 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-12 22:00:47,533 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 22:01:01,695 WARN L205 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 22:01:09,815 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-12 22:01:10,995 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:01:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:24,856 INFO L93 Difference]: Finished difference Result 2397 states and 7851 transitions. [2021-06-12 22:01:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:01:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:24,860 INFO L225 Difference]: With dead ends: 2397 [2021-06-12 22:01:24,860 INFO L226 Difference]: Without dead ends: 2382 [2021-06-12 22:01:24,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 31761.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1670, Unknown=13, NotChecked=0, Total=1980 [2021-06-12 22:01:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-12 22:01:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1750. [2021-06-12 22:01:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.4128073184676957) internal successors, (5969), 1749 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 5969 transitions. [2021-06-12 22:01:24,881 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 5969 transitions. Word has length 26 [2021-06-12 22:01:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:24,881 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 5969 transitions. [2021-06-12 22:01:24,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 5969 transitions. [2021-06-12 22:01:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:24,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:24,883 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:25,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5045 [2021-06-12 22:01:25,084 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1564484877, now seen corresponding path program 52 times [2021-06-12 22:01:25,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:25,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497933556] [2021-06-12 22:01:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:25,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497933556] [2021-06-12 22:01:25,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497933556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012123012] [2021-06-12 22:01:25,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:25,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:01:25,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:25,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:25,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 22:01:25,359 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:25,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:25,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:01:25,400 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:25,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:01:25,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:01:25,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:25,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:01:25,489 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 22:01:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012123012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:01:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886671895] [2021-06-12 22:01:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:01:25,524 INFO L87 Difference]: Start difference. First operand 1750 states and 5969 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:26,343 INFO L93 Difference]: Finished difference Result 2548 states and 8435 transitions. [2021-06-12 22:01:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:01:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:26,347 INFO L225 Difference]: With dead ends: 2548 [2021-06-12 22:01:26,348 INFO L226 Difference]: Without dead ends: 2533 [2021-06-12 22:01:26,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:01:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-12 22:01:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1753. [2021-06-12 22:01:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.4121004566210047) internal successors, (5978), 1752 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5978 transitions. [2021-06-12 22:01:26,374 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5978 transitions. Word has length 26 [2021-06-12 22:01:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:26,374 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 5978 transitions. [2021-06-12 22:01:26,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5978 transitions. [2021-06-12 22:01:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:26,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:26,376 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:26,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5156 [2021-06-12 22:01:26,577 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1040539515, now seen corresponding path program 53 times [2021-06-12 22:01:26,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:26,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945411129] [2021-06-12 22:01:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:26,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:26,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945411129] [2021-06-12 22:01:26,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945411129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:26,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010812502] [2021-06-12 22:01:26,719 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:26,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:01:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:01:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:26,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 22:01:26,870 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:26,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:26,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:01:26,902 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:26,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:01:26,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:01:26,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:01:26,984 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 22:01:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:27,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010812502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:27,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:27,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:01:27,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248033783] [2021-06-12 22:01:27,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:27,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:27,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:27,023 INFO L87 Difference]: Start difference. First operand 1753 states and 5978 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:28,011 INFO L93 Difference]: Finished difference Result 2448 states and 8097 transitions. [2021-06-12 22:01:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:01:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:28,015 INFO L225 Difference]: With dead ends: 2448 [2021-06-12 22:01:28,015 INFO L226 Difference]: Without dead ends: 2423 [2021-06-12 22:01:28,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:01:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-12 22:01:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1739. [2021-06-12 22:01:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.4177215189873418) internal successors, (5940), 1738 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 5940 transitions. [2021-06-12 22:01:28,040 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 5940 transitions. Word has length 26 [2021-06-12 22:01:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:28,040 INFO L482 AbstractCegarLoop]: Abstraction has 1739 states and 5940 transitions. [2021-06-12 22:01:28,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 5940 transitions. [2021-06-12 22:01:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:28,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:28,042 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:28,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5175 [2021-06-12 22:01:28,253 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -366405619, now seen corresponding path program 63 times [2021-06-12 22:01:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:28,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305868942] [2021-06-12 22:01:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:28,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305868942] [2021-06-12 22:01:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305868942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691591583] [2021-06-12 22:01:28,356 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:28,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:01:28,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:01:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:28,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-12 22:01:28,566 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:28,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 22:01:28,700 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:28,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:28,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:28,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 22:01:28,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:01:29,399 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-12 22:01:29,399 INFO L628 ElimStorePlain]: treesize reduction 230, result has 87.5 percent of original size [2021-06-12 22:01:29,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:01:29,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:88 [2021-06-12 22:01:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:29,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691591583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:29,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:29,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:01:29,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787589840] [2021-06-12 22:01:29,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:01:29,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:29,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:01:29,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:01:29,767 INFO L87 Difference]: Start difference. First operand 1739 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:30,808 INFO L93 Difference]: Finished difference Result 3292 states and 10488 transitions. [2021-06-12 22:01:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:01:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:30,813 INFO L225 Difference]: With dead ends: 3292 [2021-06-12 22:01:30,813 INFO L226 Difference]: Without dead ends: 3248 [2021-06-12 22:01:30,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:01:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-06-12 22:01:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1786. [2021-06-12 22:01:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.4252100840336133) internal successors, (6114), 1785 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6114 transitions. [2021-06-12 22:01:30,839 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6114 transitions. Word has length 26 [2021-06-12 22:01:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6114 transitions. [2021-06-12 22:01:30,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6114 transitions. [2021-06-12 22:01:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:30,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:30,841 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:31,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5192,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:31,041 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -356659183, now seen corresponding path program 64 times [2021-06-12 22:01:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442406923] [2021-06-12 22:01:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:31,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442406923] [2021-06-12 22:01:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442406923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:31,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323901135] [2021-06-12 22:01:31,179 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:31,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:01:31,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:01:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:31,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,360 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:01:31,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 175 [2021-06-12 22:01:31,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:31,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,384 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:01:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 98 [2021-06-12 22:01:31,386 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:31,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:31,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:01:31,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:31,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:31,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:01:31,408 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:212, output treesize:3 [2021-06-12 22:01:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:31,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323901135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:31,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:31,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:01:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785906704] [2021-06-12 22:01:31,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:31,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:01:31,421 INFO L87 Difference]: Start difference. First operand 1786 states and 6114 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:32,332 INFO L93 Difference]: Finished difference Result 2484 states and 8179 transitions. [2021-06-12 22:01:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:01:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:32,336 INFO L225 Difference]: With dead ends: 2484 [2021-06-12 22:01:32,336 INFO L226 Difference]: Without dead ends: 2462 [2021-06-12 22:01:32,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:01:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-12 22:01:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1807. [2021-06-12 22:01:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 3.4186046511627906) internal successors, (6174), 1806 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6174 transitions. [2021-06-12 22:01:32,359 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6174 transitions. Word has length 26 [2021-06-12 22:01:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:32,359 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 6174 transitions. [2021-06-12 22:01:32,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6174 transitions. [2021-06-12 22:01:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:32,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:32,361 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:32,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5363 [2021-06-12 22:01:32,562 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash 568834683, now seen corresponding path program 65 times [2021-06-12 22:01:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:32,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264576612] [2021-06-12 22:01:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:32,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:32,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264576612] [2021-06-12 22:01:32,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264576612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:32,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426016667] [2021-06-12 22:01:32,682 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:32,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:01:32,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:34,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:34,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:34,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 22:01:34,634 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:34,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:34,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:34,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:34,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:34,645 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 37 treesize of output 27 [2021-06-12 22:01:34,647 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:01:34,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:34,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 22:01:34,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:34,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:34,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:01:34,674 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 22:01:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:34,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426016667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:34,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:34,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:01:34,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647795912] [2021-06-12 22:01:34,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:34,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:34,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:34,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=209, Unknown=2, NotChecked=0, Total=272 [2021-06-12 22:01:34,696 INFO L87 Difference]: Start difference. First operand 1807 states and 6174 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-12 22:01:57,394 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 22:01:58,690 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 22:02:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:00,517 INFO L93 Difference]: Finished difference Result 2669 states and 8779 transitions. [2021-06-12 22:02:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:02:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-06-12 22:02:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:00,521 INFO L225 Difference]: With dead ends: 2669 [2021-06-12 22:02:00,521 INFO L226 Difference]: Without dead ends: 2650 [2021-06-12 22:02:00,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 4764.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1157, Unknown=2, NotChecked=0, Total=1482 [2021-06-12 22:02:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-12 22:02:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1827. [2021-06-12 22:02:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.423329682365827) internal successors, (6251), 1826 states have internal predecessors, (6251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6251 transitions. [2021-06-12 22:02:00,543 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6251 transitions. Word has length 26 [2021-06-12 22:02:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:00,543 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6251 transitions. [2021-06-12 22:02:00,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-12 22:02:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6251 transitions. [2021-06-12 22:02:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:00,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:00,545 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:00,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5364 [2021-06-12 22:02:00,745 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1843182409, now seen corresponding path program 54 times [2021-06-12 22:02:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829722928] [2021-06-12 22:02:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:00,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:00,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829722928] [2021-06-12 22:02:00,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829722928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:00,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311156019] [2021-06-12 22:02:00,856 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:00,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:02:00,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:02:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:01,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 22:02:01,086 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:01,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 22:02:01,158 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:01,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:02:01,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:01,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:01,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:01,334 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:110 [2021-06-12 22:02:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:01,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311156019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:01,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:01,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:02:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607652803] [2021-06-12 22:02:01,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:02:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:02:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:02:01,438 INFO L87 Difference]: Start difference. First operand 1827 states and 6251 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:02,994 INFO L93 Difference]: Finished difference Result 2809 states and 9183 transitions. [2021-06-12 22:02:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:02:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:02:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:02,998 INFO L225 Difference]: With dead ends: 2809 [2021-06-12 22:02:02,998 INFO L226 Difference]: Without dead ends: 2794 [2021-06-12 22:02:02,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:02:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-12 22:02:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1827. [2021-06-12 22:02:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.41894852135816) internal successors, (6243), 1826 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6243 transitions. [2021-06-12 22:02:03,023 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6243 transitions. Word has length 26 [2021-06-12 22:02:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:03,023 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6243 transitions. [2021-06-12 22:02:03,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6243 transitions. [2021-06-12 22:02:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:03,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:03,025 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:03,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-06-12 22:02:03,241 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash 761841983, now seen corresponding path program 55 times [2021-06-12 22:02:03,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:03,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797490241] [2021-06-12 22:02:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:03,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797490241] [2021-06-12 22:02:03,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797490241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920591121] [2021-06-12 22:02:03,351 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:03,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:02:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:03,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 22:02:03,560 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:03,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:03,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:02:03,595 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:03,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:02:03,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:03,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:03,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:03,689 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-12 22:02:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:03,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920591121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:03,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:03,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:02:03,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026957568] [2021-06-12 22:02:03,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:02:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:02:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:02:03,727 INFO L87 Difference]: Start difference. First operand 1827 states and 6243 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:12,737 INFO L93 Difference]: Finished difference Result 2450 states and 8163 transitions. [2021-06-12 22:02:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:02:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:02:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:12,740 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 22:02:12,740 INFO L226 Difference]: Without dead ends: 2425 [2021-06-12 22:02:12,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:02:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-12 22:02:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1821. [2021-06-12 22:02:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 3.4164835164835163) internal successors, (6218), 1820 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6218 transitions. [2021-06-12 22:02:12,761 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6218 transitions. Word has length 26 [2021-06-12 22:02:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:12,761 INFO L482 AbstractCegarLoop]: Abstraction has 1821 states and 6218 transitions. [2021-06-12 22:02:12,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6218 transitions. [2021-06-12 22:02:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:12,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:12,763 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:12,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:12,964 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:12,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1900688067, now seen corresponding path program 56 times [2021-06-12 22:02:12,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:12,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407047496] [2021-06-12 22:02:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:13,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407047496] [2021-06-12 22:02:13,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407047496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876428662] [2021-06-12 22:02:13,077 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:13,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:13,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:02:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:13,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:13,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 22:02:13,233 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:13,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:13,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:02:13,264 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:13,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:02:13,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:13,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:13,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:13,346 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 22:02:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:13,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876428662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:13,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:13,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:02:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092250002] [2021-06-12 22:02:13,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:02:13,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:02:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:02:13,379 INFO L87 Difference]: Start difference. First operand 1821 states and 6218 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:14,243 INFO L93 Difference]: Finished difference Result 2386 states and 7961 transitions. [2021-06-12 22:02:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:02:14,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:02:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:14,247 INFO L225 Difference]: With dead ends: 2386 [2021-06-12 22:02:14,247 INFO L226 Difference]: Without dead ends: 2371 [2021-06-12 22:02:14,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 584.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:02:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-12 22:02:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1810. [2021-06-12 22:02:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.4201216141514648) internal successors, (6187), 1809 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6187 transitions. [2021-06-12 22:02:14,270 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6187 transitions. Word has length 26 [2021-06-12 22:02:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:14,270 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 6187 transitions. [2021-06-12 22:02:14,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6187 transitions. [2021-06-12 22:02:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:14,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:14,272 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:14,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5444,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:14,488 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1048584581, now seen corresponding path program 57 times [2021-06-12 22:02:14,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:14,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78076009] [2021-06-12 22:02:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:14,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:14,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78076009] [2021-06-12 22:02:14,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78076009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:14,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876930055] [2021-06-12 22:02:14,610 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:14,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:02:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:02:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:16,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 22:02:16,294 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:16,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:16,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 22:02:16,361 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:16,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-12 22:02:16,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:16,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:16,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:02:16,545 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:219 [2021-06-12 22:02:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:16,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876930055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:16,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:16,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:02:16,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316447757] [2021-06-12 22:02:16,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:02:16,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:16,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:02:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=236, Unknown=1, NotChecked=0, Total=306 [2021-06-12 22:02:16,660 INFO L87 Difference]: Start difference. First operand 1810 states and 6187 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:17,122 INFO L93 Difference]: Finished difference Result 2367 states and 7927 transitions. [2021-06-12 22:02:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:02:17,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:02:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:17,126 INFO L225 Difference]: With dead ends: 2367 [2021-06-12 22:02:17,126 INFO L226 Difference]: Without dead ends: 2352 [2021-06-12 22:02:17,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1966.4ms TimeCoverageRelationStatistics Valid=166, Invalid=589, Unknown=1, NotChecked=0, Total=756 [2021-06-12 22:02:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-06-12 22:02:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1804. [2021-06-12 22:02:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4215196894065447) internal successors, (6169), 1803 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6169 transitions. [2021-06-12 22:02:17,146 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6169 transitions. Word has length 26 [2021-06-12 22:02:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:17,146 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6169 transitions. [2021-06-12 22:02:17,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6169 transitions. [2021-06-12 22:02:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:17,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:17,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:17,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5462,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:17,348 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash 203762543, now seen corresponding path program 66 times [2021-06-12 22:02:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:17,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345726384] [2021-06-12 22:02:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:17,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345726384] [2021-06-12 22:02:17,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345726384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422859571] [2021-06-12 22:02:17,492 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:17,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:02:17,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:17,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:02:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 22:02:17,651 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:17,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:17,661 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 37 treesize of output 27 [2021-06-12 22:02:17,663 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:17,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:17,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 22:02:17,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:02:17,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:17,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:17,686 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 22:02:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:17,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422859571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:17,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:17,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:02:17,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333809334] [2021-06-12 22:02:17,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:02:17,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:02:17,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:02:17,705 INFO L87 Difference]: Start difference. First operand 1804 states and 6169 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:02:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:19,066 INFO L93 Difference]: Finished difference Result 2506 states and 8313 transitions. [2021-06-12 22:02:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:02:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-12 22:02:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:19,080 INFO L225 Difference]: With dead ends: 2506 [2021-06-12 22:02:19,080 INFO L226 Difference]: Without dead ends: 2484 [2021-06-12 22:02:19,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:02:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-12 22:02:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1798. [2021-06-12 22:02:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.4201446855870894) internal successors, (6146), 1797 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6146 transitions. [2021-06-12 22:02:19,103 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6146 transitions. Word has length 26 [2021-06-12 22:02:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:19,104 INFO L482 AbstractCegarLoop]: Abstraction has 1798 states and 6146 transitions. [2021-06-12 22:02:19,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:02:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6146 transitions. [2021-06-12 22:02:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:19,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:19,106 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:19,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:19,321 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -82162369, now seen corresponding path program 67 times [2021-06-12 22:02:19,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:19,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705891435] [2021-06-12 22:02:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:19,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705891435] [2021-06-12 22:02:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705891435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118393220] [2021-06-12 22:02:19,463 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:02:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:21,617 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-12 22:02:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:21,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:21,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:21,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-12 22:02:21,628 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:21,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:21,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:21,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:21,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:02:21,638 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 37 treesize of output 27 [2021-06-12 22:02:21,640 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:21,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:21,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 22:02:21,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:02:21,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:21,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:21,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 22:02:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:21,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118393220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:21,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:21,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:02:21,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703747145] [2021-06-12 22:02:21,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:02:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:02:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2021-06-12 22:02:21,681 INFO L87 Difference]: Start difference. First operand 1798 states and 6146 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-12 22:02:23,288 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-12 22:02:24,173 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 22:02:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:24,217 INFO L93 Difference]: Finished difference Result 2433 states and 8050 transitions. [2021-06-12 22:02:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:02:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-12 22:02:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:24,220 INFO L225 Difference]: With dead ends: 2433 [2021-06-12 22:02:24,220 INFO L226 Difference]: Without dead ends: 2414 [2021-06-12 22:02:24,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4456.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1179, Unknown=1, NotChecked=0, Total=1482 [2021-06-12 22:02:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-12 22:02:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1788. [2021-06-12 22:02:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.420817011751539) internal successors, (6113), 1787 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6113 transitions. [2021-06-12 22:02:24,244 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6113 transitions. Word has length 26 [2021-06-12 22:02:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:24,244 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6113 transitions. [2021-06-12 22:02:24,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-12 22:02:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6113 transitions. [2021-06-12 22:02:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:24,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:24,246 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:24,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5518,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:24,455 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1381576581, now seen corresponding path program 68 times [2021-06-12 22:02:24,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:24,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168619990] [2021-06-12 22:02:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:24,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:24,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168619990] [2021-06-12 22:02:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168619990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331597946] [2021-06-12 22:02:24,594 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:24,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:24,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:24,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:02:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:28,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-12 22:02:28,889 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:28,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:28,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:28,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 22:02:29,000 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:29,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:29,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:29,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 22:02:29,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:29,956 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2021-06-12 22:02:29,957 INFO L628 ElimStorePlain]: treesize reduction 862, result has 54.9 percent of original size [2021-06-12 22:02:30,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:30,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:78 [2021-06-12 22:02:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:30,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331597946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:30,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:30,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:02:30,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859122181] [2021-06-12 22:02:30,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:02:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:30,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:02:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2021-06-12 22:02:30,253 INFO L87 Difference]: Start difference. First operand 1788 states and 6113 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:02:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:31,096 INFO L93 Difference]: Finished difference Result 2410 states and 8027 transitions. [2021-06-12 22:02:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:02:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-12 22:02:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:31,100 INFO L225 Difference]: With dead ends: 2410 [2021-06-12 22:02:31,100 INFO L226 Difference]: Without dead ends: 2395 [2021-06-12 22:02:31,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4689.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1092, Unknown=2, NotChecked=0, Total=1332 [2021-06-12 22:02:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-12 22:02:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1793. [2021-06-12 22:02:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.42578125) internal successors, (6139), 1792 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6139 transitions. [2021-06-12 22:02:31,121 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6139 transitions. Word has length 26 [2021-06-12 22:02:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:31,122 INFO L482 AbstractCegarLoop]: Abstraction has 1793 states and 6139 transitions. [2021-06-12 22:02:31,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:02:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6139 transitions. [2021-06-12 22:02:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:02:31,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:31,124 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:31,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-12 22:02:31,336 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1841060543, now seen corresponding path program 69 times [2021-06-12 22:02:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200550089] [2021-06-12 22:02:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:31,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:31,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200550089] [2021-06-12 22:02:31,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200550089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:31,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361784028] [2021-06-12 22:02:31,464 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:31,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:02:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:31,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:02:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:33,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:33,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:33,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-12 22:02:33,677 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:33,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:02:33,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:33,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 22:02:33,788 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:02:33,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:33,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:02:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-12 22:02:34,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 22:02:34,643 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-12 22:02:34,643 INFO L628 ElimStorePlain]: treesize reduction 708, result has 70.2 percent of original size [2021-06-12 22:02:35,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:02:35,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:43 [2021-06-12 22:02:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361784028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:35,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:35,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:02:35,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250421089] [2021-06-12 22:02:35,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:35,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-06-12 22:02:35,083 INFO L87 Difference]: Start difference. First operand 1793 states and 6139 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:53,138 INFO L93 Difference]: Finished difference Result 2526 states and 8347 transitions. [2021-06-12 22:02:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:02:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:02:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:53,141 INFO L225 Difference]: With dead ends: 2526 [2021-06-12 22:02:53,141 INFO L226 Difference]: Without dead ends: 2496 [2021-06-12 22:02:53,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2516.0ms TimeCoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2021-06-12 22:02:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-12 22:02:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1788. [2021-06-12 22:02:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.4191382204812535) internal successors, (6110), 1787 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6110 transitions. [2021-06-12 22:02:53,162 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6110 transitions. Word has length 26 [2021-06-12 22:02:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:53,162 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6110 transitions. [2021-06-12 22:02:53,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6110 transitions. [2021-06-12 22:02:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:53,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:53,164 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:53,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-12 22:02:53,364 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1705681877, now seen corresponding path program 58 times [2021-06-12 22:02:53,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:53,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44190610] [2021-06-12 22:02:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:53,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:53,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44190610] [2021-06-12 22:02:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44190610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:53,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278159605] [2021-06-12 22:02:53,404 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:53,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:53,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278159605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:53,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:53,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:02:53,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653702104] [2021-06-12 22:02:53,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:53,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:53,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:53,520 INFO L87 Difference]: Start difference. First operand 1788 states and 6110 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:54,467 INFO L93 Difference]: Finished difference Result 4735 states and 14630 transitions. [2021-06-12 22:02:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:02:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:54,474 INFO L225 Difference]: With dead ends: 4735 [2021-06-12 22:02:54,474 INFO L226 Difference]: Without dead ends: 4735 [2021-06-12 22:02:54,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:02:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-12 22:02:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 1981. [2021-06-12 22:02:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.4752525252525253) internal successors, (6881), 1980 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6881 transitions. [2021-06-12 22:02:54,510 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6881 transitions. Word has length 28 [2021-06-12 22:02:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:54,510 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 6881 transitions. [2021-06-12 22:02:54,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6881 transitions. [2021-06-12 22:02:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:54,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:54,512 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:54,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-12 22:02:54,713 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:54,713 INFO L82 PathProgramCache]: Analyzing trace with hash 729363033, now seen corresponding path program 59 times [2021-06-12 22:02:54,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:54,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368368091] [2021-06-12 22:02:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:54,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:54,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368368091] [2021-06-12 22:02:54,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368368091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:54,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006780699] [2021-06-12 22:02:54,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:54,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:02:54,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:54,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006780699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:54,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:54,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:02:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670742497] [2021-06-12 22:02:54,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:02:54,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:02:54,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:02:54,889 INFO L87 Difference]: Start difference. First operand 1981 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-06-12 22:02:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:56,050 INFO L93 Difference]: Finished difference Result 6281 states and 19109 transitions. [2021-06-12 22:02:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:02:56,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-12 22:02:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:56,058 INFO L225 Difference]: With dead ends: 6281 [2021-06-12 22:02:56,058 INFO L226 Difference]: Without dead ends: 6281 [2021-06-12 22:02:56,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:02:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2021-06-12 22:02:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 1992. [2021-06-12 22:02:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 3.4831742842792566) internal successors, (6935), 1991 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 6935 transitions. [2021-06-12 22:02:56,103 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 6935 transitions. Word has length 28 [2021-06-12 22:02:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:56,103 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 6935 transitions. [2021-06-12 22:02:56,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-06-12 22:02:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 6935 transitions. [2021-06-12 22:02:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:56,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:56,105 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:56,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:56,306 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1296315113, now seen corresponding path program 60 times [2021-06-12 22:02:56,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:56,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049853904] [2021-06-12 22:02:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:56,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:56,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049853904] [2021-06-12 22:02:56,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049853904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:56,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796488277] [2021-06-12 22:02:56,345 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:56,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:02:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796488277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:56,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:56,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:02:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501997619] [2021-06-12 22:02:56,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:02:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:02:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:02:56,471 INFO L87 Difference]: Start difference. First operand 1992 states and 6935 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-06-12 22:02:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:57,619 INFO L93 Difference]: Finished difference Result 5674 states and 17641 transitions. [2021-06-12 22:02:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:02:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-12 22:02:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:57,626 INFO L225 Difference]: With dead ends: 5674 [2021-06-12 22:02:57,626 INFO L226 Difference]: Without dead ends: 5674 [2021-06-12 22:02:57,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:02:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-06-12 22:02:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 1940. [2021-06-12 22:02:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4569365652398143) internal successors, (6703), 1939 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6703 transitions. [2021-06-12 22:02:57,663 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6703 transitions. Word has length 28 [2021-06-12 22:02:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 1940 states and 6703 transitions. [2021-06-12 22:02:57,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-06-12 22:02:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6703 transitions. [2021-06-12 22:02:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:57,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:57,666 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:57,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5786,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:57,866 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1816623861, now seen corresponding path program 61 times [2021-06-12 22:02:57,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:57,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921051283] [2021-06-12 22:02:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:57,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:57,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921051283] [2021-06-12 22:02:57,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921051283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:57,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764705309] [2021-06-12 22:02:57,907 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:57,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:58,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764705309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:58,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:58,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:02:58,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633310862] [2021-06-12 22:02:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:58,021 INFO L87 Difference]: Start difference. First operand 1940 states and 6703 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:59,019 INFO L93 Difference]: Finished difference Result 4821 states and 14797 transitions. [2021-06-12 22:02:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:02:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:59,026 INFO L225 Difference]: With dead ends: 4821 [2021-06-12 22:02:59,026 INFO L226 Difference]: Without dead ends: 4821 [2021-06-12 22:02:59,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:02:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2021-06-12 22:02:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 1950. [2021-06-12 22:02:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.452539763981529) internal successors, (6729), 1949 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6729 transitions. [2021-06-12 22:02:59,061 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6729 transitions. Word has length 28 [2021-06-12 22:02:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:59,061 INFO L482 AbstractCegarLoop]: Abstraction has 1950 states and 6729 transitions. [2021-06-12 22:02:59,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6729 transitions. [2021-06-12 22:02:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:59,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:59,063 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:59,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5787,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:59,264 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1268713169, now seen corresponding path program 70 times [2021-06-12 22:02:59,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:59,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80626277] [2021-06-12 22:02:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:59,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:59,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80626277] [2021-06-12 22:02:59,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80626277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:59,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407678381] [2021-06-12 22:02:59,303 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:59,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:59,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407678381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:02:59,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197268892] [2021-06-12 22:02:59,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:59,413 INFO L87 Difference]: Start difference. First operand 1950 states and 6729 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:59,979 INFO L93 Difference]: Finished difference Result 4242 states and 13200 transitions. [2021-06-12 22:02:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:02:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:59,984 INFO L225 Difference]: With dead ends: 4242 [2021-06-12 22:02:59,984 INFO L226 Difference]: Without dead ends: 4242 [2021-06-12 22:02:59,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:02:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-12 22:03:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 2006. [2021-06-12 22:03:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.437406483790524) internal successors, (6892), 2005 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 6892 transitions. [2021-06-12 22:03:00,016 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 6892 transitions. Word has length 28 [2021-06-12 22:03:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:00,016 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 6892 transitions. [2021-06-12 22:03:00,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 6892 transitions. [2021-06-12 22:03:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:00,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:00,019 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:00,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5788,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:00,219 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1127344537, now seen corresponding path program 62 times [2021-06-12 22:03:00,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:00,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163539939] [2021-06-12 22:03:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:00,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163539939] [2021-06-12 22:03:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163539939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596886419] [2021-06-12 22:03:00,246 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596886419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:03:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907461763] [2021-06-12 22:03:00,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:00,325 INFO L87 Difference]: Start difference. First operand 2006 states and 6892 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:00,484 INFO L93 Difference]: Finished difference Result 3508 states and 11418 transitions. [2021-06-12 22:03:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:03:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:00,489 INFO L225 Difference]: With dead ends: 3508 [2021-06-12 22:03:00,489 INFO L226 Difference]: Without dead ends: 3490 [2021-06-12 22:03:00,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:03:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-12 22:03:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2393. [2021-06-12 22:03:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 3.5100334448160537) internal successors, (8396), 2392 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 8396 transitions. [2021-06-12 22:03:00,519 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 8396 transitions. Word has length 28 [2021-06-12 22:03:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:00,519 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 8396 transitions. [2021-06-12 22:03:00,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 8396 transitions. [2021-06-12 22:03:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:00,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:00,522 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:00,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-06-12 22:03:00,722 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash 690375829, now seen corresponding path program 63 times [2021-06-12 22:03:00,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:00,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438712530] [2021-06-12 22:03:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:00,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438712530] [2021-06-12 22:03:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438712530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753246952] [2021-06-12 22:03:00,753 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:03:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:00,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753246952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:03:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367269933] [2021-06-12 22:03:00,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:00,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:00,850 INFO L87 Difference]: Start difference. First operand 2393 states and 8396 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:01,415 INFO L93 Difference]: Finished difference Result 4165 states and 13279 transitions. [2021-06-12 22:03:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:03:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:01,420 INFO L225 Difference]: With dead ends: 4165 [2021-06-12 22:03:01,420 INFO L226 Difference]: Without dead ends: 4118 [2021-06-12 22:03:01,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:03:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-06-12 22:03:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2561. [2021-06-12 22:03:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.53046875) internal successors, (9038), 2560 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9038 transitions. [2021-06-12 22:03:01,461 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9038 transitions. Word has length 28 [2021-06-12 22:03:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:01,461 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 9038 transitions. [2021-06-12 22:03:01,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9038 transitions. [2021-06-12 22:03:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:01,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:01,464 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:01,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5790 [2021-06-12 22:03:01,673 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1670242449, now seen corresponding path program 71 times [2021-06-12 22:03:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:01,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571892068] [2021-06-12 22:03:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:01,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:01,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571892068] [2021-06-12 22:03:01,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571892068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:01,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739654824] [2021-06-12 22:03:01,715 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:01,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:01,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:01,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739654824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:01,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:01,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 22:03:01,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5639547] [2021-06-12 22:03:01,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:03:01,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:03:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:03:01,844 INFO L87 Difference]: Start difference. First operand 2561 states and 9038 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:02,277 INFO L93 Difference]: Finished difference Result 5014 states and 16655 transitions. [2021-06-12 22:03:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:03:02,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:02,285 INFO L225 Difference]: With dead ends: 5014 [2021-06-12 22:03:02,285 INFO L226 Difference]: Without dead ends: 4927 [2021-06-12 22:03:02,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:03:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-06-12 22:03:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3219. [2021-06-12 22:03:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 3.550652579241765) internal successors, (11426), 3218 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 11426 transitions. [2021-06-12 22:03:02,339 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 11426 transitions. Word has length 28 [2021-06-12 22:03:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:02,339 INFO L482 AbstractCegarLoop]: Abstraction has 3219 states and 11426 transitions. [2021-06-12 22:03:02,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 11426 transitions. [2021-06-12 22:03:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:02,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:02,343 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:02,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5791,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:02,544 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2068501991, now seen corresponding path program 64 times [2021-06-12 22:03:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:02,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872622271] [2021-06-12 22:03:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872622271] [2021-06-12 22:03:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872622271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558440992] [2021-06-12 22:03:02,589 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:02,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:02,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558440992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:02,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:02,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122748783] [2021-06-12 22:03:02,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:02,697 INFO L87 Difference]: Start difference. First operand 3219 states and 11426 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:03,383 INFO L93 Difference]: Finished difference Result 5456 states and 17327 transitions. [2021-06-12 22:03:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:03:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:03,392 INFO L225 Difference]: With dead ends: 5456 [2021-06-12 22:03:03,393 INFO L226 Difference]: Without dead ends: 5430 [2021-06-12 22:03:03,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:03:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-06-12 22:03:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3237. [2021-06-12 22:03:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.5559332509270702) internal successors, (11507), 3236 states have internal predecessors, (11507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11507 transitions. [2021-06-12 22:03:03,451 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11507 transitions. Word has length 28 [2021-06-12 22:03:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 3237 states and 11507 transitions. [2021-06-12 22:03:03,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11507 transitions. [2021-06-12 22:03:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:03,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:03,455 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:03,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5792 [2021-06-12 22:03:03,655 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1396089209, now seen corresponding path program 65 times [2021-06-12 22:03:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:03,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114788075] [2021-06-12 22:03:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:03,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114788075] [2021-06-12 22:03:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114788075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152801123] [2021-06-12 22:03:03,687 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:03,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:03,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:03,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:03,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152801123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:03,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:03,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963060183] [2021-06-12 22:03:03,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:03,794 INFO L87 Difference]: Start difference. First operand 3237 states and 11507 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:04,424 INFO L93 Difference]: Finished difference Result 5511 states and 17519 transitions. [2021-06-12 22:03:04,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:03:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:04,431 INFO L225 Difference]: With dead ends: 5511 [2021-06-12 22:03:04,431 INFO L226 Difference]: Without dead ends: 5480 [2021-06-12 22:03:04,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:03:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2021-06-12 22:03:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 3230. [2021-06-12 22:03:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 3.562403220811397) internal successors, (11503), 3229 states have internal predecessors, (11503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 11503 transitions. [2021-06-12 22:03:04,484 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 11503 transitions. Word has length 28 [2021-06-12 22:03:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:04,484 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 11503 transitions. [2021-06-12 22:03:04,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 11503 transitions. [2021-06-12 22:03:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:04,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:04,488 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:04,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5793 [2021-06-12 22:03:04,688 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1850079165, now seen corresponding path program 66 times [2021-06-12 22:03:04,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:04,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881946611] [2021-06-12 22:03:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:04,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881946611] [2021-06-12 22:03:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881946611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396799335] [2021-06-12 22:03:04,720 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:04,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:03:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:04,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396799335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:04,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:04,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:04,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790591947] [2021-06-12 22:03:04,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:04,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:04,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:04,808 INFO L87 Difference]: Start difference. First operand 3230 states and 11503 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:05,318 INFO L93 Difference]: Finished difference Result 6692 states and 21656 transitions. [2021-06-12 22:03:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:03:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:05,328 INFO L225 Difference]: With dead ends: 6692 [2021-06-12 22:03:05,328 INFO L226 Difference]: Without dead ends: 6645 [2021-06-12 22:03:05,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:03:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6645 states. [2021-06-12 22:03:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6645 to 3393. [2021-06-12 22:03:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.608490566037736) internal successors, (12240), 3392 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12240 transitions. [2021-06-12 22:03:05,397 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12240 transitions. Word has length 28 [2021-06-12 22:03:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:05,397 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12240 transitions. [2021-06-12 22:03:05,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12240 transitions. [2021-06-12 22:03:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:05,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:05,401 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:05,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5794 [2021-06-12 22:03:05,601 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash -361109379, now seen corresponding path program 67 times [2021-06-12 22:03:05,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667872950] [2021-06-12 22:03:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:05,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667872950] [2021-06-12 22:03:05,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667872950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329767567] [2021-06-12 22:03:05,623 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:05,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329767567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:05,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:05,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:03:05,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101318290] [2021-06-12 22:03:05,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:03:05,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:05,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:03:05,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:03:05,701 INFO L87 Difference]: Start difference. First operand 3393 states and 12240 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:05,859 INFO L93 Difference]: Finished difference Result 5080 states and 16859 transitions. [2021-06-12 22:03:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:03:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:05,866 INFO L225 Difference]: With dead ends: 5080 [2021-06-12 22:03:05,866 INFO L226 Difference]: Without dead ends: 5080 [2021-06-12 22:03:05,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:03:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-12 22:03:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 3225. [2021-06-12 22:03:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.5688585607940446) internal successors, (11506), 3224 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 11506 transitions. [2021-06-12 22:03:05,914 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 11506 transitions. Word has length 28 [2021-06-12 22:03:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:05,914 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 11506 transitions. [2021-06-12 22:03:05,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 11506 transitions. [2021-06-12 22:03:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:05,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:05,918 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:06,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-12 22:03:06,118 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1707790945, now seen corresponding path program 68 times [2021-06-12 22:03:06,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:06,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804161248] [2021-06-12 22:03:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:06,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804161248] [2021-06-12 22:03:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804161248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664886073] [2021-06-12 22:03:06,153 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:06,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:06,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:06,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:06,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664886073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:06,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:06,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564164544] [2021-06-12 22:03:06,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:06,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:06,246 INFO L87 Difference]: Start difference. First operand 3225 states and 11506 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:06,871 INFO L93 Difference]: Finished difference Result 7140 states and 22841 transitions. [2021-06-12 22:03:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:03:06,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:06,881 INFO L225 Difference]: With dead ends: 7140 [2021-06-12 22:03:06,881 INFO L226 Difference]: Without dead ends: 7140 [2021-06-12 22:03:06,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:03:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-12 22:03:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3255. [2021-06-12 22:03:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 3.5682237246465887) internal successors, (11611), 3254 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 11611 transitions. [2021-06-12 22:03:06,950 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 11611 transitions. Word has length 28 [2021-06-12 22:03:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:06,951 INFO L482 AbstractCegarLoop]: Abstraction has 3255 states and 11611 transitions. [2021-06-12 22:03:06,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 11611 transitions. [2021-06-12 22:03:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:06,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:06,954 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:07,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5796,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:07,155 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash -922876851, now seen corresponding path program 69 times [2021-06-12 22:03:07,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:07,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592847766] [2021-06-12 22:03:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:07,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592847766] [2021-06-12 22:03:07,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592847766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218565618] [2021-06-12 22:03:07,188 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:07,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:03:07,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:07,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:07,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218565618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:07,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:07,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:07,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329803766] [2021-06-12 22:03:07,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:07,282 INFO L87 Difference]: Start difference. First operand 3255 states and 11611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:08,018 INFO L93 Difference]: Finished difference Result 7432 states and 23809 transitions. [2021-06-12 22:03:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:03:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:08,028 INFO L225 Difference]: With dead ends: 7432 [2021-06-12 22:03:08,028 INFO L226 Difference]: Without dead ends: 7432 [2021-06-12 22:03:08,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:03:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-12 22:03:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 3385. [2021-06-12 22:03:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 3.551418439716312) internal successors, (12018), 3384 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 12018 transitions. [2021-06-12 22:03:08,097 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 12018 transitions. Word has length 28 [2021-06-12 22:03:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:08,097 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 12018 transitions. [2021-06-12 22:03:08,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 12018 transitions. [2021-06-12 22:03:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:08,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:08,101 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:08,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5797,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:08,302 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2005899507, now seen corresponding path program 70 times [2021-06-12 22:03:08,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:08,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102413647] [2021-06-12 22:03:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:08,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102413647] [2021-06-12 22:03:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102413647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675133417] [2021-06-12 22:03:08,336 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:08,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675133417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:08,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:08,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835213612] [2021-06-12 22:03:08,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:08,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:08,424 INFO L87 Difference]: Start difference. First operand 3385 states and 12018 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:09,000 INFO L93 Difference]: Finished difference Result 7940 states and 25456 transitions. [2021-06-12 22:03:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:03:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:09,011 INFO L225 Difference]: With dead ends: 7940 [2021-06-12 22:03:09,011 INFO L226 Difference]: Without dead ends: 7927 [2021-06-12 22:03:09,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:03:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-12 22:03:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 4042. [2021-06-12 22:03:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.5921801534273694) internal successors, (14516), 4041 states have internal predecessors, (14516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 14516 transitions. [2021-06-12 22:03:09,094 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 14516 transitions. Word has length 28 [2021-06-12 22:03:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:09,095 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 14516 transitions. [2021-06-12 22:03:09,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 14516 transitions. [2021-06-12 22:03:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:09,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:09,100 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:09,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5798,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:09,300 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash -534821389, now seen corresponding path program 71 times [2021-06-12 22:03:09,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:09,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519746692] [2021-06-12 22:03:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:09,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:09,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519746692] [2021-06-12 22:03:09,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519746692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:09,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765148502] [2021-06-12 22:03:09,341 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:09,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:03:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:09,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765148502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:09,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:09,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310428268] [2021-06-12 22:03:09,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:09,434 INFO L87 Difference]: Start difference. First operand 4042 states and 14516 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:10,068 INFO L93 Difference]: Finished difference Result 8192 states and 26150 transitions. [2021-06-12 22:03:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:03:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:10,080 INFO L225 Difference]: With dead ends: 8192 [2021-06-12 22:03:10,080 INFO L226 Difference]: Without dead ends: 8192 [2021-06-12 22:03:10,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:03:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-06-12 22:03:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 3795. [2021-06-12 22:03:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.5579862941486557) internal successors, (13499), 3794 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 13499 transitions. [2021-06-12 22:03:10,159 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 13499 transitions. Word has length 28 [2021-06-12 22:03:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:10,159 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 13499 transitions. [2021-06-12 22:03:10,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 13499 transitions. [2021-06-12 22:03:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:10,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:10,164 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:10,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5799,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:10,364 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -967697993, now seen corresponding path program 72 times [2021-06-12 22:03:10,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:10,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860566384] [2021-06-12 22:03:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:10,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860566384] [2021-06-12 22:03:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860566384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402802602] [2021-06-12 22:03:10,396 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:10,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:10,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402802602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:10,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:10,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:10,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330630673] [2021-06-12 22:03:10,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:10,485 INFO L87 Difference]: Start difference. First operand 3795 states and 13499 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:11,141 INFO L93 Difference]: Finished difference Result 7285 states and 23940 transitions. [2021-06-12 22:03:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:03:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:11,152 INFO L225 Difference]: With dead ends: 7285 [2021-06-12 22:03:11,152 INFO L226 Difference]: Without dead ends: 7281 [2021-06-12 22:03:11,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:03:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-12 22:03:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 3428. [2021-06-12 22:03:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.604610446454625) internal successors, (12353), 3427 states have internal predecessors, (12353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12353 transitions. [2021-06-12 22:03:11,224 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12353 transitions. Word has length 28 [2021-06-12 22:03:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:11,224 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 12353 transitions. [2021-06-12 22:03:11,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12353 transitions. [2021-06-12 22:03:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:11,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:11,228 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:11,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:11,433 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1239707183, now seen corresponding path program 73 times [2021-06-12 22:03:11,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:11,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930885665] [2021-06-12 22:03:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:11,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:11,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930885665] [2021-06-12 22:03:11,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930885665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:11,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795568908] [2021-06-12 22:03:11,469 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:11,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:11,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795568908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:11,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:11,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102926513] [2021-06-12 22:03:11,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:11,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:11,600 INFO L87 Difference]: Start difference. First operand 3428 states and 12353 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:03:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:12,600 INFO L93 Difference]: Finished difference Result 11601 states and 38335 transitions. [2021-06-12 22:03:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:03:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-12 22:03:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:12,618 INFO L225 Difference]: With dead ends: 11601 [2021-06-12 22:03:12,618 INFO L226 Difference]: Without dead ends: 11601 [2021-06-12 22:03:12,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:03:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-06-12 22:03:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 3716. [2021-06-12 22:03:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6855989232839836) internal successors, (13692), 3715 states have internal predecessors, (13692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13692 transitions. [2021-06-12 22:03:12,723 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13692 transitions. Word has length 28 [2021-06-12 22:03:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:12,723 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 13692 transitions. [2021-06-12 22:03:12,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:03:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13692 transitions. [2021-06-12 22:03:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:12,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:12,728 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:12,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5801 [2021-06-12 22:03:12,928 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash -672755103, now seen corresponding path program 74 times [2021-06-12 22:03:12,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:12,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858356091] [2021-06-12 22:03:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:12,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:12,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858356091] [2021-06-12 22:03:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858356091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:12,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507685443] [2021-06-12 22:03:12,963 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:12,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:12,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507685443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:13,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:13,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755568350] [2021-06-12 22:03:13,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:13,079 INFO L87 Difference]: Start difference. First operand 3716 states and 13692 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:03:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:14,060 INFO L93 Difference]: Finished difference Result 11295 states and 37518 transitions. [2021-06-12 22:03:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:03:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-12 22:03:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:14,079 INFO L225 Difference]: With dead ends: 11295 [2021-06-12 22:03:14,079 INFO L226 Difference]: Without dead ends: 11295 [2021-06-12 22:03:14,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:03:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-12 22:03:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 3670. [2021-06-12 22:03:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.666121559007904) internal successors, (13451), 3669 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13451 transitions. [2021-06-12 22:03:14,180 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13451 transitions. Word has length 28 [2021-06-12 22:03:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:14,180 INFO L482 AbstractCegarLoop]: Abstraction has 3670 states and 13451 transitions. [2021-06-12 22:03:14,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:03:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13451 transitions. [2021-06-12 22:03:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:14,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:14,185 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:14,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:14,385 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1845100961, now seen corresponding path program 75 times [2021-06-12 22:03:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108090434] [2021-06-12 22:03:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:14,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:14,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108090434] [2021-06-12 22:03:14,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108090434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:14,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569849912] [2021-06-12 22:03:14,417 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:14,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:03:14,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:14,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:14,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:14,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569849912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:14,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:14,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:03:14,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290765161] [2021-06-12 22:03:14,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:14,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:14,519 INFO L87 Difference]: Start difference. First operand 3670 states and 13451 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:03:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:15,371 INFO L93 Difference]: Finished difference Result 10610 states and 34061 transitions. [2021-06-12 22:03:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:03:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:03:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:15,386 INFO L225 Difference]: With dead ends: 10610 [2021-06-12 22:03:15,386 INFO L226 Difference]: Without dead ends: 10610 [2021-06-12 22:03:15,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:03:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-06-12 22:03:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 3710. [2021-06-12 22:03:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3709 states have (on average 3.6702615260177947) internal successors, (13613), 3709 states have internal predecessors, (13613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 13613 transitions. [2021-06-12 22:03:15,478 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 13613 transitions. Word has length 28 [2021-06-12 22:03:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:15,478 INFO L482 AbstractCegarLoop]: Abstraction has 3710 states and 13613 transitions. [2021-06-12 22:03:15,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:03:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 13613 transitions. [2021-06-12 22:03:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:15,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:15,482 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:15,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5803,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:15,683 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1763724873, now seen corresponding path program 76 times [2021-06-12 22:03:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:15,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237653032] [2021-06-12 22:03:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:15,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237653032] [2021-06-12 22:03:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237653032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137443871] [2021-06-12 22:03:15,714 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:15,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:15,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137443871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:15,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:15,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:03:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099954825] [2021-06-12 22:03:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:15,814 INFO L87 Difference]: Start difference. First operand 3710 states and 13613 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:03:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:16,654 INFO L93 Difference]: Finished difference Result 9989 states and 32538 transitions. [2021-06-12 22:03:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:03:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:03:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:16,669 INFO L225 Difference]: With dead ends: 9989 [2021-06-12 22:03:16,669 INFO L226 Difference]: Without dead ends: 9981 [2021-06-12 22:03:16,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:03:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-12 22:03:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 3676. [2021-06-12 22:03:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.6653061224489796) internal successors, (13470), 3675 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 13470 transitions. [2021-06-12 22:03:16,767 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 13470 transitions. Word has length 28 [2021-06-12 22:03:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:16,767 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 13470 transitions. [2021-06-12 22:03:16,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:03:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 13470 transitions. [2021-06-12 22:03:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:16,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:16,771 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:16,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:16,985 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash -833067657, now seen corresponding path program 77 times [2021-06-12 22:03:16,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:16,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565034467] [2021-06-12 22:03:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:17,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565034467] [2021-06-12 22:03:17,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565034467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748973718] [2021-06-12 22:03:17,017 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:17,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:03:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:17,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748973718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:17,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:17,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:17,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107823028] [2021-06-12 22:03:17,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:17,151 INFO L87 Difference]: Start difference. First operand 3676 states and 13470 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:18,096 INFO L93 Difference]: Finished difference Result 9584 states and 31413 transitions. [2021-06-12 22:03:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:03:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:18,110 INFO L225 Difference]: With dead ends: 9584 [2021-06-12 22:03:18,110 INFO L226 Difference]: Without dead ends: 9584 [2021-06-12 22:03:18,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:03:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-06-12 22:03:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 3692. [2021-06-12 22:03:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.666756976429152) internal successors, (13534), 3691 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13534 transitions. [2021-06-12 22:03:18,201 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13534 transitions. Word has length 28 [2021-06-12 22:03:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:18,201 INFO L482 AbstractCegarLoop]: Abstraction has 3692 states and 13534 transitions. [2021-06-12 22:03:18,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13534 transitions. [2021-06-12 22:03:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:18,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:18,205 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:18,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-12 22:03:18,406 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 809971497, now seen corresponding path program 78 times [2021-06-12 22:03:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512084405] [2021-06-12 22:03:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:18,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512084405] [2021-06-12 22:03:18,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512084405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918535150] [2021-06-12 22:03:18,438 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:18,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:03:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:18,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918535150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:18,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:18,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:03:18,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948000205] [2021-06-12 22:03:18,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:18,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:18,550 INFO L87 Difference]: Start difference. First operand 3692 states and 13534 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:19,430 INFO L93 Difference]: Finished difference Result 9249 states and 30618 transitions. [2021-06-12 22:03:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:03:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:19,444 INFO L225 Difference]: With dead ends: 9249 [2021-06-12 22:03:19,444 INFO L226 Difference]: Without dead ends: 9241 [2021-06-12 22:03:19,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:03:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-06-12 22:03:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 3360. [2021-06-12 22:03:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.5802322119678474) internal successors, (12026), 3359 states have internal predecessors, (12026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12026 transitions. [2021-06-12 22:03:19,536 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12026 transitions. Word has length 28 [2021-06-12 22:03:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:19,536 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 12026 transitions. [2021-06-12 22:03:19,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12026 transitions. [2021-06-12 22:03:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:19,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:19,541 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:19,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5806 [2021-06-12 22:03:19,741 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 893375077, now seen corresponding path program 79 times [2021-06-12 22:03:19,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:19,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695708058] [2021-06-12 22:03:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:19,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:19,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695708058] [2021-06-12 22:03:19,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695708058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:19,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709645978] [2021-06-12 22:03:19,775 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709645978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:03:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574977745] [2021-06-12 22:03:19,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:19,886 INFO L87 Difference]: Start difference. First operand 3360 states and 12026 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:20,713 INFO L93 Difference]: Finished difference Result 7017 states and 22977 transitions. [2021-06-12 22:03:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:03:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:03:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:20,723 INFO L225 Difference]: With dead ends: 7017 [2021-06-12 22:03:20,723 INFO L226 Difference]: Without dead ends: 7017 [2021-06-12 22:03:20,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:03:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-12 22:03:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 3372. [2021-06-12 22:03:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.5787600118659153) internal successors, (12064), 3371 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12064 transitions. [2021-06-12 22:03:20,802 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12064 transitions. Word has length 28 [2021-06-12 22:03:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:20,802 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 12064 transitions. [2021-06-12 22:03:20,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12064 transitions. [2021-06-12 22:03:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:20,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:20,807 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:21,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5807 [2021-06-12 22:03:21,007 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1748232043, now seen corresponding path program 80 times [2021-06-12 22:03:21,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:21,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172670548] [2021-06-12 22:03:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:21,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172670548] [2021-06-12 22:03:21,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172670548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:21,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516992912] [2021-06-12 22:03:21,045 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:21,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516992912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:21,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:21,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414549867] [2021-06-12 22:03:21,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:21,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:21,170 INFO L87 Difference]: Start difference. First operand 3372 states and 12064 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:22,188 INFO L93 Difference]: Finished difference Result 7945 states and 25366 transitions. [2021-06-12 22:03:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:03:22,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:22,199 INFO L225 Difference]: With dead ends: 7945 [2021-06-12 22:03:22,199 INFO L226 Difference]: Without dead ends: 7945 [2021-06-12 22:03:22,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:03:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-12 22:03:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3438. [2021-06-12 22:03:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.5731742798952575) internal successors, (12281), 3437 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 12281 transitions. [2021-06-12 22:03:22,280 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 12281 transitions. Word has length 28 [2021-06-12 22:03:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:22,280 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 12281 transitions. [2021-06-12 22:03:22,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 12281 transitions. [2021-06-12 22:03:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:22,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:22,284 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:22,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5808 [2021-06-12 22:03:22,485 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:22,485 INFO L82 PathProgramCache]: Analyzing trace with hash -105192889, now seen corresponding path program 81 times [2021-06-12 22:03:22,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:22,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761186783] [2021-06-12 22:03:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:22,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761186783] [2021-06-12 22:03:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761186783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978529253] [2021-06-12 22:03:22,521 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:22,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:03:22,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:22,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978529253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:22,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:22,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770655691] [2021-06-12 22:03:22,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:22,640 INFO L87 Difference]: Start difference. First operand 3438 states and 12281 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:23,559 INFO L93 Difference]: Finished difference Result 7328 states and 23738 transitions. [2021-06-12 22:03:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:03:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:23,569 INFO L225 Difference]: With dead ends: 7328 [2021-06-12 22:03:23,570 INFO L226 Difference]: Without dead ends: 7324 [2021-06-12 22:03:23,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:03:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-06-12 22:03:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3373. [2021-06-12 22:03:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.5711743772241995) internal successors, (12042), 3372 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12042 transitions. [2021-06-12 22:03:23,637 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12042 transitions. Word has length 28 [2021-06-12 22:03:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:23,637 INFO L482 AbstractCegarLoop]: Abstraction has 3373 states and 12042 transitions. [2021-06-12 22:03:23,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12042 transitions. [2021-06-12 22:03:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:23,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:23,641 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:23,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5809 [2021-06-12 22:03:23,842 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash 474250335, now seen corresponding path program 72 times [2021-06-12 22:03:23,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:23,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343384257] [2021-06-12 22:03:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:23,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:23,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343384257] [2021-06-12 22:03:23,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343384257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:23,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036043269] [2021-06-12 22:03:23,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:23,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:03:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:23,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036043269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:23,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:23,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:03:23,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617386786] [2021-06-12 22:03:23,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:23,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:23,975 INFO L87 Difference]: Start difference. First operand 3373 states and 12042 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:24,526 INFO L93 Difference]: Finished difference Result 6471 states and 21326 transitions. [2021-06-12 22:03:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:03:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:24,535 INFO L225 Difference]: With dead ends: 6471 [2021-06-12 22:03:24,535 INFO L226 Difference]: Without dead ends: 6471 [2021-06-12 22:03:24,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:03:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-12 22:03:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 3377. [2021-06-12 22:03:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.572867298578199) internal successors, (12062), 3376 states have internal predecessors, (12062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 12062 transitions. [2021-06-12 22:03:24,592 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 12062 transitions. Word has length 28 [2021-06-12 22:03:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:24,592 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 12062 transitions. [2021-06-12 22:03:24,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 12062 transitions. [2021-06-12 22:03:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:24,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:24,615 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:24,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:24,815 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1137549427, now seen corresponding path program 73 times [2021-06-12 22:03:24,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:24,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481961915] [2021-06-12 22:03:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:24,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481961915] [2021-06-12 22:03:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481961915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462933184] [2021-06-12 22:03:24,856 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:24,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462933184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:24,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:24,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:03:24,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877391939] [2021-06-12 22:03:24,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:24,950 INFO L87 Difference]: Start difference. First operand 3377 states and 12062 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:25,617 INFO L93 Difference]: Finished difference Result 6945 states and 22648 transitions. [2021-06-12 22:03:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:03:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:25,627 INFO L225 Difference]: With dead ends: 6945 [2021-06-12 22:03:25,627 INFO L226 Difference]: Without dead ends: 6945 [2021-06-12 22:03:25,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:03:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6945 states. [2021-06-12 22:03:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6945 to 3391. [2021-06-12 22:03:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.5702064896755163) internal successors, (12103), 3390 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 12103 transitions. [2021-06-12 22:03:25,693 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 12103 transitions. Word has length 28 [2021-06-12 22:03:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:25,693 INFO L482 AbstractCegarLoop]: Abstraction has 3391 states and 12103 transitions. [2021-06-12 22:03:25,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 12103 transitions. [2021-06-12 22:03:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:25,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:25,697 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:25,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5811 [2021-06-12 22:03:25,898 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1369089075, now seen corresponding path program 74 times [2021-06-12 22:03:25,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:25,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683641097] [2021-06-12 22:03:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:25,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683641097] [2021-06-12 22:03:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683641097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103154792] [2021-06-12 22:03:25,936 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:25,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:25,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:26,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103154792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:26,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:26,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:03:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67152598] [2021-06-12 22:03:26,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:26,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:26,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:26,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:26,049 INFO L87 Difference]: Start difference. First operand 3391 states and 12103 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:26,896 INFO L93 Difference]: Finished difference Result 7449 states and 24075 transitions. [2021-06-12 22:03:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:03:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:26,906 INFO L225 Difference]: With dead ends: 7449 [2021-06-12 22:03:26,906 INFO L226 Difference]: Without dead ends: 7449 [2021-06-12 22:03:26,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:03:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-12 22:03:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 3471. [2021-06-12 22:03:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 3.563400576368876) internal successors, (12365), 3470 states have internal predecessors, (12365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 12365 transitions. [2021-06-12 22:03:26,975 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 12365 transitions. Word has length 28 [2021-06-12 22:03:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:26,975 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 12365 transitions. [2021-06-12 22:03:26,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 12365 transitions. [2021-06-12 22:03:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:26,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:26,979 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:27,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5812,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:27,180 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1349373261, now seen corresponding path program 75 times [2021-06-12 22:03:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:27,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774845991] [2021-06-12 22:03:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:27,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774845991] [2021-06-12 22:03:27,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774845991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640415859] [2021-06-12 22:03:27,217 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:27,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:03:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640415859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:27,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:27,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:03:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172088009] [2021-06-12 22:03:27,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:27,326 INFO L87 Difference]: Start difference. First operand 3471 states and 12365 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-06-12 22:03:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:27,817 INFO L93 Difference]: Finished difference Result 7261 states and 24833 transitions. [2021-06-12 22:03:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:03:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-06-12 22:03:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:27,827 INFO L225 Difference]: With dead ends: 7261 [2021-06-12 22:03:27,828 INFO L226 Difference]: Without dead ends: 7261 [2021-06-12 22:03:27,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:03:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2021-06-12 22:03:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 4582. [2021-06-12 22:03:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.6797642436149314) internal successors, (16857), 4581 states have internal predecessors, (16857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16857 transitions. [2021-06-12 22:03:27,905 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16857 transitions. Word has length 28 [2021-06-12 22:03:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:27,905 INFO L482 AbstractCegarLoop]: Abstraction has 4582 states and 16857 transitions. [2021-06-12 22:03:27,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-06-12 22:03:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16857 transitions. [2021-06-12 22:03:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:27,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:27,911 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:28,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:28,111 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1413910217, now seen corresponding path program 76 times [2021-06-12 22:03:28,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:28,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904438290] [2021-06-12 22:03:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:28,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:28,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904438290] [2021-06-12 22:03:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904438290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:28,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558898432] [2021-06-12 22:03:28,149 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:28,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:28,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558898432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:28,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:28,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:03:28,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571131887] [2021-06-12 22:03:28,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:28,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:28,239 INFO L87 Difference]: Start difference. First operand 4582 states and 16857 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:28,977 INFO L93 Difference]: Finished difference Result 8354 states and 28597 transitions. [2021-06-12 22:03:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:03:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:28,990 INFO L225 Difference]: With dead ends: 8354 [2021-06-12 22:03:28,990 INFO L226 Difference]: Without dead ends: 8350 [2021-06-12 22:03:28,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:03:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2021-06-12 22:03:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 4474. [2021-06-12 22:03:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 3.6908115358819584) internal successors, (16509), 4473 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16509 transitions. [2021-06-12 22:03:29,081 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16509 transitions. Word has length 28 [2021-06-12 22:03:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:29,081 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 16509 transitions. [2021-06-12 22:03:29,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16509 transitions. [2021-06-12 22:03:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:29,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:29,086 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:29,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5814,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:29,287 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash 606347251, now seen corresponding path program 82 times [2021-06-12 22:03:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:29,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402767154] [2021-06-12 22:03:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:29,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:29,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402767154] [2021-06-12 22:03:29,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402767154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:29,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735371803] [2021-06-12 22:03:29,313 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:29,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735371803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:03:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852167025] [2021-06-12 22:03:29,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:29,415 INFO L87 Difference]: Start difference. First operand 4474 states and 16509 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:30,207 INFO L93 Difference]: Finished difference Result 9509 states and 32189 transitions. [2021-06-12 22:03:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:03:30,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:30,221 INFO L225 Difference]: With dead ends: 9509 [2021-06-12 22:03:30,221 INFO L226 Difference]: Without dead ends: 9497 [2021-06-12 22:03:30,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:03:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-12 22:03:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 4945. [2021-06-12 22:03:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 3.7744741100323624) internal successors, (18661), 4944 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 18661 transitions. [2021-06-12 22:03:30,334 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 18661 transitions. Word has length 28 [2021-06-12 22:03:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:30,334 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 18661 transitions. [2021-06-12 22:03:30,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 18661 transitions. [2021-06-12 22:03:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:30,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:30,340 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:30,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5815 [2021-06-12 22:03:30,541 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1647278645, now seen corresponding path program 83 times [2021-06-12 22:03:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872129507] [2021-06-12 22:03:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872129507] [2021-06-12 22:03:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872129507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927059359] [2021-06-12 22:03:30,567 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:30,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:03:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:30,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927059359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:30,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:30,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:03:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265545832] [2021-06-12 22:03:30,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:30,669 INFO L87 Difference]: Start difference. First operand 4945 states and 18661 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:31,457 INFO L93 Difference]: Finished difference Result 9844 states and 33233 transitions. [2021-06-12 22:03:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:03:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:31,474 INFO L225 Difference]: With dead ends: 9844 [2021-06-12 22:03:31,474 INFO L226 Difference]: Without dead ends: 9844 [2021-06-12 22:03:31,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:03:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2021-06-12 22:03:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 4966. [2021-06-12 22:03:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 3.7593152064451156) internal successors, (18665), 4965 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 18665 transitions. [2021-06-12 22:03:31,574 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 18665 transitions. Word has length 28 [2021-06-12 22:03:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:31,574 INFO L482 AbstractCegarLoop]: Abstraction has 4966 states and 18665 transitions. [2021-06-12 22:03:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 18665 transitions. [2021-06-12 22:03:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:31,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:31,581 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:31,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5816,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:31,781 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1444282361, now seen corresponding path program 84 times [2021-06-12 22:03:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801837102] [2021-06-12 22:03:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:31,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801837102] [2021-06-12 22:03:31,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801837102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:31,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324186905] [2021-06-12 22:03:31,812 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:31,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:03:31,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:31,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:31,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324186905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:31,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:31,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:03:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681485176] [2021-06-12 22:03:31,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:31,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:31,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:31,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:31,892 INFO L87 Difference]: Start difference. First operand 4966 states and 18665 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:32,279 INFO L93 Difference]: Finished difference Result 9292 states and 33167 transitions. [2021-06-12 22:03:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:03:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:32,293 INFO L225 Difference]: With dead ends: 9292 [2021-06-12 22:03:32,293 INFO L226 Difference]: Without dead ends: 9209 [2021-06-12 22:03:32,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:03:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2021-06-12 22:03:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 6387. [2021-06-12 22:03:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6387 states, 6386 states have (on average 3.8042593172564985) internal successors, (24294), 6386 states have internal predecessors, (24294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6387 states to 6387 states and 24294 transitions. [2021-06-12 22:03:32,406 INFO L78 Accepts]: Start accepts. Automaton has 6387 states and 24294 transitions. Word has length 28 [2021-06-12 22:03:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:32,406 INFO L482 AbstractCegarLoop]: Abstraction has 6387 states and 24294 transitions. [2021-06-12 22:03:32,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6387 states and 24294 transitions. [2021-06-12 22:03:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:32,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:32,415 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:32,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5817 [2021-06-12 22:03:32,615 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1642669955, now seen corresponding path program 85 times [2021-06-12 22:03:32,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:32,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28610361] [2021-06-12 22:03:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:32,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28610361] [2021-06-12 22:03:32,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28610361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995246107] [2021-06-12 22:03:32,640 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995246107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:32,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:32,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:03:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953051388] [2021-06-12 22:03:32,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:03:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:03:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:03:32,712 INFO L87 Difference]: Start difference. First operand 6387 states and 24294 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:32,880 INFO L93 Difference]: Finished difference Result 8813 states and 31347 transitions. [2021-06-12 22:03:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:03:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:32,893 INFO L225 Difference]: With dead ends: 8813 [2021-06-12 22:03:32,893 INFO L226 Difference]: Without dead ends: 8813 [2021-06-12 22:03:32,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:03:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-06-12 22:03:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 6533. [2021-06-12 22:03:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 3.7819963257807716) internal successors, (24704), 6532 states have internal predecessors, (24704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 24704 transitions. [2021-06-12 22:03:32,995 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 24704 transitions. Word has length 28 [2021-06-12 22:03:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:32,995 INFO L482 AbstractCegarLoop]: Abstraction has 6533 states and 24704 transitions. [2021-06-12 22:03:32,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 24704 transitions. [2021-06-12 22:03:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:33,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:33,004 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:33,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:33,209 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -712470211, now seen corresponding path program 86 times [2021-06-12 22:03:33,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:33,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3765848] [2021-06-12 22:03:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:33,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3765848] [2021-06-12 22:03:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3765848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511598717] [2021-06-12 22:03:33,249 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:33,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511598717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:33,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:03:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550238198] [2021-06-12 22:03:33,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:33,332 INFO L87 Difference]: Start difference. First operand 6533 states and 24704 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:34,055 INFO L93 Difference]: Finished difference Result 13541 states and 47408 transitions. [2021-06-12 22:03:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:03:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:34,078 INFO L225 Difference]: With dead ends: 13541 [2021-06-12 22:03:34,078 INFO L226 Difference]: Without dead ends: 13541 [2021-06-12 22:03:34,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:03:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13541 states. [2021-06-12 22:03:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13541 to 7282. [2021-06-12 22:03:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7282 states, 7281 states have (on average 3.7915121549237742) internal successors, (27606), 7281 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7282 states to 7282 states and 27606 transitions. [2021-06-12 22:03:34,234 INFO L78 Accepts]: Start accepts. Automaton has 7282 states and 27606 transitions. Word has length 28 [2021-06-12 22:03:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:34,234 INFO L482 AbstractCegarLoop]: Abstraction has 7282 states and 27606 transitions. [2021-06-12 22:03:34,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7282 states and 27606 transitions. [2021-06-12 22:03:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:34,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:34,244 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:34,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5819 [2021-06-12 22:03:34,445 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1190209241, now seen corresponding path program 87 times [2021-06-12 22:03:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:34,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432433802] [2021-06-12 22:03:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:34,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:34,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432433802] [2021-06-12 22:03:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432433802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:34,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141651464] [2021-06-12 22:03:34,477 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:34,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:03:34,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:34,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141651464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:34,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:34,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:03:34,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613905140] [2021-06-12 22:03:34,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:34,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:34,562 INFO L87 Difference]: Start difference. First operand 7282 states and 27606 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:35,175 INFO L93 Difference]: Finished difference Result 13742 states and 48131 transitions. [2021-06-12 22:03:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:03:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:35,199 INFO L225 Difference]: With dead ends: 13742 [2021-06-12 22:03:35,200 INFO L226 Difference]: Without dead ends: 13742 [2021-06-12 22:03:35,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:03:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-12 22:03:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7548. [2021-06-12 22:03:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7547 states have (on average 3.7695773154895984) internal successors, (28449), 7547 states have internal predecessors, (28449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 28449 transitions. [2021-06-12 22:03:35,386 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 28449 transitions. Word has length 28 [2021-06-12 22:03:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:35,386 INFO L482 AbstractCegarLoop]: Abstraction has 7548 states and 28449 transitions. [2021-06-12 22:03:35,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 28449 transitions. [2021-06-12 22:03:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:35,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:35,396 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:35,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5820 [2021-06-12 22:03:35,597 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 107186585, now seen corresponding path program 88 times [2021-06-12 22:03:35,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:35,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998755932] [2021-06-12 22:03:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:35,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998755932] [2021-06-12 22:03:35,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998755932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080231751] [2021-06-12 22:03:35,623 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:35,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080231751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:35,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:35,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:03:35,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197592501] [2021-06-12 22:03:35,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:35,708 INFO L87 Difference]: Start difference. First operand 7548 states and 28449 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:03:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:36,036 INFO L93 Difference]: Finished difference Result 10106 states and 36610 transitions. [2021-06-12 22:03:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:03:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:03:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:36,053 INFO L225 Difference]: With dead ends: 10106 [2021-06-12 22:03:36,053 INFO L226 Difference]: Without dead ends: 10076 [2021-06-12 22:03:36,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:03:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10076 states. [2021-06-12 22:03:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10076 to 8389. [2021-06-12 22:03:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8389 states, 8388 states have (on average 3.790414878397711) internal successors, (31794), 8388 states have internal predecessors, (31794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 31794 transitions. [2021-06-12 22:03:36,192 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 31794 transitions. Word has length 28 [2021-06-12 22:03:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:36,192 INFO L482 AbstractCegarLoop]: Abstraction has 8389 states and 31794 transitions. [2021-06-12 22:03:36,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:03:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 31794 transitions. [2021-06-12 22:03:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:36,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:36,203 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:36,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:36,404 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1578264703, now seen corresponding path program 89 times [2021-06-12 22:03:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:36,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638092656] [2021-06-12 22:03:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:36,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:36,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638092656] [2021-06-12 22:03:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638092656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:36,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357816277] [2021-06-12 22:03:36,430 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:36,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:36,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:36,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:36,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357816277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:36,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:36,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:03:36,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870856915] [2021-06-12 22:03:36,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:36,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:36,514 INFO L87 Difference]: Start difference. First operand 8389 states and 31794 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:03:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:36,872 INFO L93 Difference]: Finished difference Result 10680 states and 38512 transitions. [2021-06-12 22:03:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:03:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:03:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:36,890 INFO L225 Difference]: With dead ends: 10680 [2021-06-12 22:03:36,890 INFO L226 Difference]: Without dead ends: 10680 [2021-06-12 22:03:36,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:03:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2021-06-12 22:03:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 8429. [2021-06-12 22:03:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8428 states have (on average 3.786544850498339) internal successors, (31913), 8428 states have internal predecessors, (31913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 31913 transitions. [2021-06-12 22:03:37,039 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 31913 transitions. Word has length 28 [2021-06-12 22:03:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:37,039 INFO L482 AbstractCegarLoop]: Abstraction has 8429 states and 31913 transitions. [2021-06-12 22:03:37,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:03:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 31913 transitions. [2021-06-12 22:03:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:37,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:37,051 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:37,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5822,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:37,252 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:37,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1145388099, now seen corresponding path program 90 times [2021-06-12 22:03:37,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:37,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034465554] [2021-06-12 22:03:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:37,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034465554] [2021-06-12 22:03:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034465554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254236067] [2021-06-12 22:03:37,291 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:37,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:37,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254236067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:37,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:37,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:03:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890893736] [2021-06-12 22:03:37,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:37,368 INFO L87 Difference]: Start difference. First operand 8429 states and 31913 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:37,946 INFO L93 Difference]: Finished difference Result 14428 states and 51414 transitions. [2021-06-12 22:03:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:03:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:37,973 INFO L225 Difference]: With dead ends: 14428 [2021-06-12 22:03:37,973 INFO L226 Difference]: Without dead ends: 14424 [2021-06-12 22:03:37,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:03:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-06-12 22:03:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 8333. [2021-06-12 22:03:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8332 states have (on average 3.790326452232357) internal successors, (31581), 8332 states have internal predecessors, (31581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 31581 transitions. [2021-06-12 22:03:38,188 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 31581 transitions. Word has length 28 [2021-06-12 22:03:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:38,188 INFO L482 AbstractCegarLoop]: Abstraction has 8333 states and 31581 transitions. [2021-06-12 22:03:38,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 31581 transitions. [2021-06-12 22:03:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:38,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:38,199 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:38,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5823,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:38,400 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash 249567283, now seen corresponding path program 91 times [2021-06-12 22:03:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:38,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133577176] [2021-06-12 22:03:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:38,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:38,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133577176] [2021-06-12 22:03:38,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133577176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:38,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694950137] [2021-06-12 22:03:38,431 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694950137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:03:38,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555472096] [2021-06-12 22:03:38,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:38,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:38,516 INFO L87 Difference]: Start difference. First operand 8333 states and 31581 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:38,913 INFO L93 Difference]: Finished difference Result 10897 states and 39312 transitions. [2021-06-12 22:03:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:03:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:38,932 INFO L225 Difference]: With dead ends: 10897 [2021-06-12 22:03:38,932 INFO L226 Difference]: Without dead ends: 10897 [2021-06-12 22:03:38,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:03:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10897 states. [2021-06-12 22:03:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 8279. [2021-06-12 22:03:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.783884996375936) internal successors, (31323), 8278 states have internal predecessors, (31323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31323 transitions. [2021-06-12 22:03:39,071 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31323 transitions. Word has length 28 [2021-06-12 22:03:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:39,071 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31323 transitions. [2021-06-12 22:03:39,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31323 transitions. [2021-06-12 22:03:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:39,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:39,083 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5824,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:39,283 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1742724757, now seen corresponding path program 92 times [2021-06-12 22:03:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213371584] [2021-06-12 22:03:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:39,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:39,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213371584] [2021-06-12 22:03:39,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213371584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:39,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754175011] [2021-06-12 22:03:39,320 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:39,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754175011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:39,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:39,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:03:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879709199] [2021-06-12 22:03:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:39,396 INFO L87 Difference]: Start difference. First operand 8279 states and 31323 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:40,087 INFO L93 Difference]: Finished difference Result 14309 states and 50902 transitions. [2021-06-12 22:03:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:03:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:40,114 INFO L225 Difference]: With dead ends: 14309 [2021-06-12 22:03:40,115 INFO L226 Difference]: Without dead ends: 14297 [2021-06-12 22:03:40,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 382.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:03:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-12 22:03:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 8279. [2021-06-12 22:03:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.782918579366997) internal successors, (31315), 8278 states have internal predecessors, (31315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31315 transitions. [2021-06-12 22:03:40,291 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31315 transitions. Word has length 28 [2021-06-12 22:03:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:40,291 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31315 transitions. [2021-06-12 22:03:40,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31315 transitions. [2021-06-12 22:03:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:40,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:40,302 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:40,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-12 22:03:40,503 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -25556159, now seen corresponding path program 93 times [2021-06-12 22:03:40,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:40,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189888272] [2021-06-12 22:03:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189888272] [2021-06-12 22:03:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189888272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476638604] [2021-06-12 22:03:40,540 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:40,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:03:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:40,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476638604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:40,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984477176] [2021-06-12 22:03:40,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:40,632 INFO L87 Difference]: Start difference. First operand 8279 states and 31315 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:41,713 INFO L93 Difference]: Finished difference Result 22023 states and 77007 transitions. [2021-06-12 22:03:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:03:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:41,755 INFO L225 Difference]: With dead ends: 22023 [2021-06-12 22:03:41,755 INFO L226 Difference]: Without dead ends: 22023 [2021-06-12 22:03:41,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:03:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-06-12 22:03:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11426. [2021-06-12 22:03:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 3.8267833698030636) internal successors, (43721), 11425 states have internal predecessors, (43721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 43721 transitions. [2021-06-12 22:03:42,088 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 43721 transitions. Word has length 28 [2021-06-12 22:03:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:42,088 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 43721 transitions. [2021-06-12 22:03:42,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 43721 transitions. [2021-06-12 22:03:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:42,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:42,105 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:42,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5826,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:42,305 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 55819929, now seen corresponding path program 94 times [2021-06-12 22:03:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:42,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884640200] [2021-06-12 22:03:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:42,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884640200] [2021-06-12 22:03:42,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884640200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491073924] [2021-06-12 22:03:42,343 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:42,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:42,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491073924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:42,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:42,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:42,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146371219] [2021-06-12 22:03:42,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:42,430 INFO L87 Difference]: Start difference. First operand 11426 states and 43721 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:43,455 INFO L93 Difference]: Finished difference Result 21126 states and 74701 transitions. [2021-06-12 22:03:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:03:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:43,494 INFO L225 Difference]: With dead ends: 21126 [2021-06-12 22:03:43,495 INFO L226 Difference]: Without dead ends: 21114 [2021-06-12 22:03:43,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:03:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-06-12 22:03:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 11260. [2021-06-12 22:03:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 3.8314237498889776) internal successors, (43138), 11259 states have internal predecessors, (43138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 43138 transitions. [2021-06-12 22:03:43,865 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 43138 transitions. Word has length 28 [2021-06-12 22:03:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:43,865 INFO L482 AbstractCegarLoop]: Abstraction has 11260 states and 43138 transitions. [2021-06-12 22:03:43,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 43138 transitions. [2021-06-12 22:03:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:43,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:43,882 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:44,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5827 [2021-06-12 22:03:44,082 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1459272043, now seen corresponding path program 95 times [2021-06-12 22:03:44,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:44,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734971096] [2021-06-12 22:03:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:44,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734971096] [2021-06-12 22:03:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734971096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470632928] [2021-06-12 22:03:44,124 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:44,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:03:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:44,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470632928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:44,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:44,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728715083] [2021-06-12 22:03:44,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:44,219 INFO L87 Difference]: Start difference. First operand 11260 states and 43138 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:45,195 INFO L93 Difference]: Finished difference Result 21002 states and 74111 transitions. [2021-06-12 22:03:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:03:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:03:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:45,235 INFO L225 Difference]: With dead ends: 21002 [2021-06-12 22:03:45,235 INFO L226 Difference]: Without dead ends: 20966 [2021-06-12 22:03:45,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 560.3ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:03:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20966 states. [2021-06-12 22:03:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20966 to 11300. [2021-06-12 22:03:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11299 states have (on average 3.8306044782724133) internal successors, (43282), 11299 states have internal predecessors, (43282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 43282 transitions. [2021-06-12 22:03:45,619 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 43282 transitions. Word has length 28 [2021-06-12 22:03:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:45,619 INFO L482 AbstractCegarLoop]: Abstraction has 11300 states and 43282 transitions. [2021-06-12 22:03:45,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:03:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 43282 transitions. [2021-06-12 22:03:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:45,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:45,634 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:45,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5828,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:45,841 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:45,896 INFO L82 PathProgramCache]: Analyzing trace with hash 137854673, now seen corresponding path program 96 times [2021-06-12 22:03:45,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:45,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324628852] [2021-06-12 22:03:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:45,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:45,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324628852] [2021-06-12 22:03:45,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324628852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:45,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786434436] [2021-06-12 22:03:45,935 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:45,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:45,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:45,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786434436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:46,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:03:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633264683] [2021-06-12 22:03:46,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:46,048 INFO L87 Difference]: Start difference. First operand 11300 states and 43282 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:47,411 INFO L93 Difference]: Finished difference Result 20773 states and 73526 transitions. [2021-06-12 22:03:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:03:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:47,476 INFO L225 Difference]: With dead ends: 20773 [2021-06-12 22:03:47,476 INFO L226 Difference]: Without dead ends: 20773 [2021-06-12 22:03:47,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:03:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20773 states. [2021-06-12 22:03:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20773 to 11492. [2021-06-12 22:03:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11492 states, 11491 states have (on average 3.8215995126620834) internal successors, (43914), 11491 states have internal predecessors, (43914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11492 states to 11492 states and 43914 transitions. [2021-06-12 22:03:47,724 INFO L78 Accepts]: Start accepts. Automaton has 11492 states and 43914 transitions. Word has length 28 [2021-06-12 22:03:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:47,724 INFO L482 AbstractCegarLoop]: Abstraction has 11492 states and 43914 transitions. [2021-06-12 22:03:47,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 11492 states and 43914 transitions. [2021-06-12 22:03:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:47,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:47,741 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:47,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5829 [2021-06-12 22:03:47,941 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1780893827, now seen corresponding path program 97 times [2021-06-12 22:03:47,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:47,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138541419] [2021-06-12 22:03:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:47,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:47,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138541419] [2021-06-12 22:03:47,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138541419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:47,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960196904] [2021-06-12 22:03:47,996 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:48,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:48,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:48,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960196904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:48,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:48,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:03:48,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615189613] [2021-06-12 22:03:48,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:48,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:48,102 INFO L87 Difference]: Start difference. First operand 11492 states and 43914 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:49,453 INFO L93 Difference]: Finished difference Result 20234 states and 72057 transitions. [2021-06-12 22:03:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:03:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:49,492 INFO L225 Difference]: With dead ends: 20234 [2021-06-12 22:03:49,492 INFO L226 Difference]: Without dead ends: 20222 [2021-06-12 22:03:49,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:03:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20222 states. [2021-06-12 22:03:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20222 to 11374. [2021-06-12 22:03:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11374 states, 11373 states have (on average 3.8259913831003254) internal successors, (43513), 11373 states have internal predecessors, (43513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11374 states to 11374 states and 43513 transitions. [2021-06-12 22:03:49,763 INFO L78 Accepts]: Start accepts. Automaton has 11374 states and 43513 transitions. Word has length 28 [2021-06-12 22:03:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:49,763 INFO L482 AbstractCegarLoop]: Abstraction has 11374 states and 43513 transitions. [2021-06-12 22:03:49,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11374 states and 43513 transitions. [2021-06-12 22:03:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:49,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:49,779 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:49,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5830,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:49,980 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash 513436649, now seen corresponding path program 98 times [2021-06-12 22:03:49,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:49,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25788506] [2021-06-12 22:03:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:50,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25788506] [2021-06-12 22:03:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25788506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458696657] [2021-06-12 22:03:50,018 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:50,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:50,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458696657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:50,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:50,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:03:50,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906703599] [2021-06-12 22:03:50,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:50,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:50,166 INFO L87 Difference]: Start difference. First operand 11374 states and 43513 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:51,186 INFO L93 Difference]: Finished difference Result 19474 states and 69973 transitions. [2021-06-12 22:03:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:03:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:03:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:51,223 INFO L225 Difference]: With dead ends: 19474 [2021-06-12 22:03:51,223 INFO L226 Difference]: Without dead ends: 19438 [2021-06-12 22:03:51,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 634.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:03:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19438 states. [2021-06-12 22:03:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19438 to 11398. [2021-06-12 22:03:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11398 states, 11397 states have (on average 3.8249539352461173) internal successors, (43593), 11397 states have internal predecessors, (43593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11398 states to 11398 states and 43593 transitions. [2021-06-12 22:03:51,483 INFO L78 Accepts]: Start accepts. Automaton has 11398 states and 43593 transitions. Word has length 28 [2021-06-12 22:03:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:51,483 INFO L482 AbstractCegarLoop]: Abstraction has 11398 states and 43593 transitions. [2021-06-12 22:03:51,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 11398 states and 43593 transitions. [2021-06-12 22:03:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:51,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:51,499 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:51,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5831,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:51,700 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:51,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1989550525, now seen corresponding path program 99 times [2021-06-12 22:03:51,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:51,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209929764] [2021-06-12 22:03:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:51,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:51,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209929764] [2021-06-12 22:03:51,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209929764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:51,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964761527] [2021-06-12 22:03:51,798 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:51,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:03:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964761527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:51,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:51,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715193500] [2021-06-12 22:03:51,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:51,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:51,933 INFO L87 Difference]: Start difference. First operand 11398 states and 43593 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:03:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:53,196 INFO L93 Difference]: Finished difference Result 28545 states and 102022 transitions. [2021-06-12 22:03:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:03:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:03:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:53,255 INFO L225 Difference]: With dead ends: 28545 [2021-06-12 22:03:53,256 INFO L226 Difference]: Without dead ends: 28545 [2021-06-12 22:03:53,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:03:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28545 states. [2021-06-12 22:03:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28545 to 11732. [2021-06-12 22:03:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.8504816298695763) internal successors, (45170), 11731 states have internal predecessors, (45170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 45170 transitions. [2021-06-12 22:03:53,632 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 45170 transitions. Word has length 28 [2021-06-12 22:03:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:53,633 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 45170 transitions. [2021-06-12 22:03:53,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:03:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 45170 transitions. [2021-06-12 22:03:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:53,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:53,650 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:53,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5832,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:53,850 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1738464691, now seen corresponding path program 100 times [2021-06-12 22:03:53,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:53,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129842744] [2021-06-12 22:03:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:53,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129842744] [2021-06-12 22:03:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129842744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493194673] [2021-06-12 22:03:53,883 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:53,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:54,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493194673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:54,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:54,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629583389] [2021-06-12 22:03:54,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:54,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:54,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:54,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:54,005 INFO L87 Difference]: Start difference. First operand 11732 states and 45170 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:03:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:55,207 INFO L93 Difference]: Finished difference Result 27990 states and 100748 transitions. [2021-06-12 22:03:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:03:55,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:03:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:55,343 INFO L225 Difference]: With dead ends: 27990 [2021-06-12 22:03:55,343 INFO L226 Difference]: Without dead ends: 27990 [2021-06-12 22:03:55,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:03:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27990 states. [2021-06-12 22:03:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27990 to 11622. [2021-06-12 22:03:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11622 states, 11621 states have (on average 3.83779364942776) internal successors, (44599), 11621 states have internal predecessors, (44599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11622 states to 11622 states and 44599 transitions. [2021-06-12 22:03:55,784 INFO L78 Accepts]: Start accepts. Automaton has 11622 states and 44599 transitions. Word has length 28 [2021-06-12 22:03:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:55,784 INFO L482 AbstractCegarLoop]: Abstraction has 11622 states and 44599 transitions. [2021-06-12 22:03:55,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:03:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 11622 states and 44599 transitions. [2021-06-12 22:03:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:55,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:55,802 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:56,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5833,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:56,003 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 495642803, now seen corresponding path program 101 times [2021-06-12 22:03:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:56,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816889478] [2021-06-12 22:03:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816889478] [2021-06-12 22:03:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816889478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973100274] [2021-06-12 22:03:56,039 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:56,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973100274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:03:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155396060] [2021-06-12 22:03:56,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:56,153 INFO L87 Difference]: Start difference. First operand 11622 states and 44599 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:57,030 INFO L93 Difference]: Finished difference Result 22146 states and 80034 transitions. [2021-06-12 22:03:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:03:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:57,071 INFO L225 Difference]: With dead ends: 22146 [2021-06-12 22:03:57,072 INFO L226 Difference]: Without dead ends: 22146 [2021-06-12 22:03:57,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:03:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22146 states. [2021-06-12 22:03:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22146 to 11631. [2021-06-12 22:03:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 11630 states have (on average 3.8368013757523647) internal successors, (44622), 11630 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 44622 transitions. [2021-06-12 22:03:57,417 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 44622 transitions. Word has length 28 [2021-06-12 22:03:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:57,417 INFO L482 AbstractCegarLoop]: Abstraction has 11631 states and 44622 transitions. [2021-06-12 22:03:57,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 44622 transitions. [2021-06-12 22:03:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:57,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:57,434 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:57,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5834 [2021-06-12 22:03:57,634 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:57,635 INFO L82 PathProgramCache]: Analyzing trace with hash -179079075, now seen corresponding path program 102 times [2021-06-12 22:03:57,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:57,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959124791] [2021-06-12 22:03:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:57,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:57,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959124791] [2021-06-12 22:03:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959124791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:57,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322105349] [2021-06-12 22:03:57,668 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:57,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:57,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322105349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:57,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:57,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:03:57,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609414493] [2021-06-12 22:03:57,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:57,776 INFO L87 Difference]: Start difference. First operand 11631 states and 44622 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:58,513 INFO L93 Difference]: Finished difference Result 20505 states and 74794 transitions. [2021-06-12 22:03:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:03:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:03:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:58,555 INFO L225 Difference]: With dead ends: 20505 [2021-06-12 22:03:58,555 INFO L226 Difference]: Without dead ends: 20505 [2021-06-12 22:03:58,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:03:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20505 states. [2021-06-12 22:03:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20505 to 11643. [2021-06-12 22:03:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 3.836110633911699) internal successors, (44660), 11642 states have internal predecessors, (44660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 44660 transitions. [2021-06-12 22:03:58,919 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 44660 transitions. Word has length 28 [2021-06-12 22:03:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:58,920 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 44660 transitions. [2021-06-12 22:03:58,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:03:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 44660 transitions. [2021-06-12 22:03:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:58,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:58,937 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:59,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5835,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:59,138 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1474281101, now seen corresponding path program 103 times [2021-06-12 22:03:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:59,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376429694] [2021-06-12 22:03:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:59,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:59,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376429694] [2021-06-12 22:03:59,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376429694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:59,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876370283] [2021-06-12 22:03:59,174 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:59,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:59,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876370283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:59,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:59,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:59,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376027097] [2021-06-12 22:03:59,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:59,302 INFO L87 Difference]: Start difference. First operand 11643 states and 44660 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:00,468 INFO L93 Difference]: Finished difference Result 21288 states and 77031 transitions. [2021-06-12 22:04:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:04:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:00,509 INFO L225 Difference]: With dead ends: 21288 [2021-06-12 22:04:00,509 INFO L226 Difference]: Without dead ends: 21288 [2021-06-12 22:04:00,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:04:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21288 states. [2021-06-12 22:04:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21288 to 11751. [2021-06-12 22:04:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11751 states, 11750 states have (on average 3.829276595744681) internal successors, (44994), 11750 states have internal predecessors, (44994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11751 states to 11751 states and 44994 transitions. [2021-06-12 22:04:00,801 INFO L78 Accepts]: Start accepts. Automaton has 11751 states and 44994 transitions. Word has length 28 [2021-06-12 22:04:00,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:00,801 INFO L482 AbstractCegarLoop]: Abstraction has 11751 states and 44994 transitions. [2021-06-12 22:04:00,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11751 states and 44994 transitions. [2021-06-12 22:04:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:00,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:00,818 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:01,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5836,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:01,019 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:01,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1177647041, now seen corresponding path program 104 times [2021-06-12 22:04:01,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:01,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811945138] [2021-06-12 22:04:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:01,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:01,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811945138] [2021-06-12 22:04:01,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811945138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:01,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966479039] [2021-06-12 22:04:01,057 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966479039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:01,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:01,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315806378] [2021-06-12 22:04:01,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:01,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:01,169 INFO L87 Difference]: Start difference. First operand 11751 states and 44994 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:02,096 INFO L93 Difference]: Finished difference Result 20669 states and 75327 transitions. [2021-06-12 22:04:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:04:02,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:02,193 INFO L225 Difference]: With dead ends: 20669 [2021-06-12 22:04:02,193 INFO L226 Difference]: Without dead ends: 20665 [2021-06-12 22:04:02,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:04:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20665 states. [2021-06-12 22:04:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20665 to 11677. [2021-06-12 22:04:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 11676 states have (on average 3.833076396026036) internal successors, (44755), 11676 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 44755 transitions. [2021-06-12 22:04:02,446 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 44755 transitions. Word has length 28 [2021-06-12 22:04:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:02,446 INFO L482 AbstractCegarLoop]: Abstraction has 11677 states and 44755 transitions. [2021-06-12 22:04:02,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 44755 transitions. [2021-06-12 22:04:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:02,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:02,463 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:02,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5837 [2021-06-12 22:04:02,663 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1027792075, now seen corresponding path program 105 times [2021-06-12 22:04:02,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:02,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481671145] [2021-06-12 22:04:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:02,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:02,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481671145] [2021-06-12 22:04:02,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481671145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:02,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891924837] [2021-06-12 22:04:02,702 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:02,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:04:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:02,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891924837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:04:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915619113] [2021-06-12 22:04:02,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:02,815 INFO L87 Difference]: Start difference. First operand 11677 states and 44755 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:04:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:03,856 INFO L93 Difference]: Finished difference Result 19974 states and 72092 transitions. [2021-06-12 22:04:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:04:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:04:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:03,894 INFO L225 Difference]: With dead ends: 19974 [2021-06-12 22:04:03,894 INFO L226 Difference]: Without dead ends: 19974 [2021-06-12 22:04:03,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:04:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2021-06-12 22:04:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 11904. [2021-06-12 22:04:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11903 states have (on average 3.835419642107032) internal successors, (45653), 11903 states have internal predecessors, (45653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 45653 transitions. [2021-06-12 22:04:04,248 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 45653 transitions. Word has length 28 [2021-06-12 22:04:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:04,248 INFO L482 AbstractCegarLoop]: Abstraction has 11904 states and 45653 transitions. [2021-06-12 22:04:04,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:04:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 45653 transitions. [2021-06-12 22:04:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:04,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:04,264 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5838,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:04,465 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2086855541, now seen corresponding path program 106 times [2021-06-12 22:04:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140990703] [2021-06-12 22:04:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:04,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:04,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140990703] [2021-06-12 22:04:04,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140990703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:04,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287521439] [2021-06-12 22:04:04,503 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:04,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:04,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287521439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:04,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:04,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:04:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668583609] [2021-06-12 22:04:04,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:04,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:04,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:04,608 INFO L87 Difference]: Start difference. First operand 11904 states and 45653 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:04:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:05,507 INFO L93 Difference]: Finished difference Result 19505 states and 70801 transitions. [2021-06-12 22:04:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:04:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:04:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:05,545 INFO L225 Difference]: With dead ends: 19505 [2021-06-12 22:04:05,545 INFO L226 Difference]: Without dead ends: 19493 [2021-06-12 22:04:05,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 530.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:04:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19493 states. [2021-06-12 22:04:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19493 to 12006. [2021-06-12 22:04:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12006 states, 12005 states have (on average 3.829737609329446) internal successors, (45976), 12005 states have internal predecessors, (45976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12006 states to 12006 states and 45976 transitions. [2021-06-12 22:04:05,806 INFO L78 Accepts]: Start accepts. Automaton has 12006 states and 45976 transitions. Word has length 28 [2021-06-12 22:04:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:05,806 INFO L482 AbstractCegarLoop]: Abstraction has 12006 states and 45976 transitions. [2021-06-12 22:04:05,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:04:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 12006 states and 45976 transitions. [2021-06-12 22:04:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:05,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:05,823 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:06,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5839 [2021-06-12 22:04:06,023 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2013038777, now seen corresponding path program 77 times [2021-06-12 22:04:06,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:06,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036751196] [2021-06-12 22:04:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:06,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036751196] [2021-06-12 22:04:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036751196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674997971] [2021-06-12 22:04:06,063 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:06,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:04:06,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:06,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674997971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:06,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:06,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:04:06,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341791593] [2021-06-12 22:04:06,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:06,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:06,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:06,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:06,147 INFO L87 Difference]: Start difference. First operand 12006 states and 45976 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:06,600 INFO L93 Difference]: Finished difference Result 16927 states and 62911 transitions. [2021-06-12 22:04:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:04:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:04:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:06,632 INFO L225 Difference]: With dead ends: 16927 [2021-06-12 22:04:06,632 INFO L226 Difference]: Without dead ends: 16927 [2021-06-12 22:04:06,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:04:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-12 22:04:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 12078. [2021-06-12 22:04:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12078 states, 12077 states have (on average 3.8251221329800447) internal successors, (46196), 12077 states have internal predecessors, (46196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12078 states to 12078 states and 46196 transitions. [2021-06-12 22:04:06,909 INFO L78 Accepts]: Start accepts. Automaton has 12078 states and 46196 transitions. Word has length 28 [2021-06-12 22:04:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:06,909 INFO L482 AbstractCegarLoop]: Abstraction has 12078 states and 46196 transitions. [2021-06-12 22:04:06,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 12078 states and 46196 transitions. [2021-06-12 22:04:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:06,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:06,926 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:07,127 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash -570762731, now seen corresponding path program 78 times [2021-06-12 22:04:07,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:07,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118552527] [2021-06-12 22:04:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:07,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:07,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118552527] [2021-06-12 22:04:07,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118552527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:07,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081733272] [2021-06-12 22:04:07,159 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:07,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:04:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:07,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081733272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:07,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:07,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:04:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74138470] [2021-06-12 22:04:07,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:07,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:07,277 INFO L87 Difference]: Start difference. First operand 12078 states and 46196 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:07,672 INFO L93 Difference]: Finished difference Result 15219 states and 56335 transitions. [2021-06-12 22:04:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:04:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:07,701 INFO L225 Difference]: With dead ends: 15219 [2021-06-12 22:04:07,701 INFO L226 Difference]: Without dead ends: 15168 [2021-06-12 22:04:07,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:04:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15168 states. [2021-06-12 22:04:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15168 to 11725. [2021-06-12 22:04:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11725 states, 11724 states have (on average 3.8169566700784716) internal successors, (44750), 11724 states have internal predecessors, (44750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 44750 transitions. [2021-06-12 22:04:07,907 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 44750 transitions. Word has length 28 [2021-06-12 22:04:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:07,907 INFO L482 AbstractCegarLoop]: Abstraction has 11725 states and 44750 transitions. [2021-06-12 22:04:07,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 44750 transitions. [2021-06-12 22:04:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:07,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:07,925 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:08,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5841,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:08,125 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 242532185, now seen corresponding path program 79 times [2021-06-12 22:04:08,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:08,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343731511] [2021-06-12 22:04:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:08,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:08,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343731511] [2021-06-12 22:04:08,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343731511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:08,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337654727] [2021-06-12 22:04:08,159 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337654727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:08,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:08,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:08,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485893201] [2021-06-12 22:04:08,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:08,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:08,240 INFO L87 Difference]: Start difference. First operand 11725 states and 44750 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:08,836 INFO L93 Difference]: Finished difference Result 17575 states and 64328 transitions. [2021-06-12 22:04:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:04:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:08,869 INFO L225 Difference]: With dead ends: 17575 [2021-06-12 22:04:08,869 INFO L226 Difference]: Without dead ends: 17575 [2021-06-12 22:04:08,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:04:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17575 states. [2021-06-12 22:04:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17575 to 12033. [2021-06-12 22:04:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12033 states, 12032 states have (on average 3.8006981382978724) internal successors, (45730), 12032 states have internal predecessors, (45730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12033 states to 12033 states and 45730 transitions. [2021-06-12 22:04:09,193 INFO L78 Accepts]: Start accepts. Automaton has 12033 states and 45730 transitions. Word has length 28 [2021-06-12 22:04:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:09,193 INFO L482 AbstractCegarLoop]: Abstraction has 12033 states and 45730 transitions. [2021-06-12 22:04:09,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12033 states and 45730 transitions. [2021-06-12 22:04:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:09,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:09,211 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:09,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:09,411 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash 197711043, now seen corresponding path program 80 times [2021-06-12 22:04:09,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:09,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632031389] [2021-06-12 22:04:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:09,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:09,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632031389] [2021-06-12 22:04:09,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632031389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:09,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172663662] [2021-06-12 22:04:09,447 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:09,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172663662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:09,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:09,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:09,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399707343] [2021-06-12 22:04:09,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:09,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:09,532 INFO L87 Difference]: Start difference. First operand 12033 states and 45730 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:09,964 INFO L93 Difference]: Finished difference Result 17039 states and 62930 transitions. [2021-06-12 22:04:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:04:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:09,997 INFO L225 Difference]: With dead ends: 17039 [2021-06-12 22:04:09,997 INFO L226 Difference]: Without dead ends: 17031 [2021-06-12 22:04:09,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:04:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17031 states. [2021-06-12 22:04:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17031 to 11973. [2021-06-12 22:04:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11973 states, 11972 states have (on average 3.8028733711994653) internal successors, (45528), 11972 states have internal predecessors, (45528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11973 states to 11973 states and 45528 transitions. [2021-06-12 22:04:10,237 INFO L78 Accepts]: Start accepts. Automaton has 11973 states and 45528 transitions. Word has length 28 [2021-06-12 22:04:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 11973 states and 45528 transitions. [2021-06-12 22:04:10,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 11973 states and 45528 transitions. [2021-06-12 22:04:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:10,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:10,253 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:10,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:10,454 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 795047701, now seen corresponding path program 81 times [2021-06-12 22:04:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:10,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99109884] [2021-06-12 22:04:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:10,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:10,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99109884] [2021-06-12 22:04:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99109884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:10,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106126760] [2021-06-12 22:04:10,494 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:10,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:04:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:10,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106126760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:10,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:10,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:04:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228563637] [2021-06-12 22:04:10,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:10,572 INFO L87 Difference]: Start difference. First operand 11973 states and 45528 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:10,992 INFO L93 Difference]: Finished difference Result 16939 states and 62644 transitions. [2021-06-12 22:04:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:04:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:04:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:11,023 INFO L225 Difference]: With dead ends: 16939 [2021-06-12 22:04:11,023 INFO L226 Difference]: Without dead ends: 16927 [2021-06-12 22:04:11,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:04:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-12 22:04:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 11945. [2021-06-12 22:04:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11945 states, 11944 states have (on average 3.8044206296048224) internal successors, (45440), 11944 states have internal predecessors, (45440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 45440 transitions. [2021-06-12 22:04:11,253 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 45440 transitions. Word has length 28 [2021-06-12 22:04:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:11,253 INFO L482 AbstractCegarLoop]: Abstraction has 11945 states and 45440 transitions. [2021-06-12 22:04:11,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 45440 transitions. [2021-06-12 22:04:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:11,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:11,270 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:11,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:11,471 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 139638229, now seen corresponding path program 82 times [2021-06-12 22:04:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:11,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663786037] [2021-06-12 22:04:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:11,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663786037] [2021-06-12 22:04:11,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663786037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144610773] [2021-06-12 22:04:11,506 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:11,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:11,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144610773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:11,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:11,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:04:11,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414467882] [2021-06-12 22:04:11,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:04:11,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:04:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:04:11,619 INFO L87 Difference]: Start difference. First operand 11945 states and 45440 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:12,567 INFO L93 Difference]: Finished difference Result 23123 states and 82678 transitions. [2021-06-12 22:04:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:04:12,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:12,611 INFO L225 Difference]: With dead ends: 23123 [2021-06-12 22:04:12,611 INFO L226 Difference]: Without dead ends: 23123 [2021-06-12 22:04:12,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:04:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-12 22:04:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 11925. [2021-06-12 22:04:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 3.8030862126803084) internal successors, (45348), 11924 states have internal predecessors, (45348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 45348 transitions. [2021-06-12 22:04:12,881 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 45348 transitions. Word has length 28 [2021-06-12 22:04:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:12,881 INFO L482 AbstractCegarLoop]: Abstraction has 11925 states and 45348 transitions. [2021-06-12 22:04:12,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 45348 transitions. [2021-06-12 22:04:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:12,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:12,898 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:13,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5845,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:13,101 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:13,101 INFO L82 PathProgramCache]: Analyzing trace with hash 666410137, now seen corresponding path program 107 times [2021-06-12 22:04:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:13,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988082973] [2021-06-12 22:04:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:13,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:13,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988082973] [2021-06-12 22:04:13,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988082973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:13,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267343001] [2021-06-12 22:04:13,126 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:13,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:04:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:13,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267343001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:13,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:13,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:04:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111077594] [2021-06-12 22:04:13,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:13,289 INFO L87 Difference]: Start difference. First operand 11925 states and 45348 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:13,994 INFO L93 Difference]: Finished difference Result 18992 states and 68940 transitions. [2021-06-12 22:04:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:04:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:14,029 INFO L225 Difference]: With dead ends: 18992 [2021-06-12 22:04:14,029 INFO L226 Difference]: Without dead ends: 18979 [2021-06-12 22:04:14,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:04:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2021-06-12 22:04:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 13439. [2021-06-12 22:04:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 3.8746093168626285) internal successors, (52067), 13438 states have internal predecessors, (52067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 52067 transitions. [2021-06-12 22:04:14,305 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 52067 transitions. Word has length 28 [2021-06-12 22:04:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 13439 states and 52067 transitions. [2021-06-12 22:04:14,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 52067 transitions. [2021-06-12 22:04:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:14,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:14,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:14,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5846 [2021-06-12 22:04:14,529 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1338822919, now seen corresponding path program 108 times [2021-06-12 22:04:14,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:14,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590079790] [2021-06-12 22:04:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:14,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590079790] [2021-06-12 22:04:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590079790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192745597] [2021-06-12 22:04:14,554 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:14,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:04:14,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192745597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:14,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:14,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:04:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412200410] [2021-06-12 22:04:14,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:14,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:14,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:14,661 INFO L87 Difference]: Start difference. First operand 13439 states and 52067 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:15,398 INFO L93 Difference]: Finished difference Result 19144 states and 69363 transitions. [2021-06-12 22:04:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:04:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:15,494 INFO L225 Difference]: With dead ends: 19144 [2021-06-12 22:04:15,494 INFO L226 Difference]: Without dead ends: 19129 [2021-06-12 22:04:15,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:04:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19129 states. [2021-06-12 22:04:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19129 to 13406. [2021-06-12 22:04:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13406 states, 13405 states have (on average 3.873330846698993) internal successors, (51922), 13405 states have internal predecessors, (51922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 51922 transitions. [2021-06-12 22:04:15,755 INFO L78 Accepts]: Start accepts. Automaton has 13406 states and 51922 transitions. Word has length 28 [2021-06-12 22:04:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:15,755 INFO L482 AbstractCegarLoop]: Abstraction has 13406 states and 51922 transitions. [2021-06-12 22:04:15,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13406 states and 51922 transitions. [2021-06-12 22:04:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:15,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:15,774 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:15,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5847,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:15,974 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash -476515903, now seen corresponding path program 109 times [2021-06-12 22:04:15,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:15,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554355907] [2021-06-12 22:04:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:16,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554355907] [2021-06-12 22:04:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554355907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033024856] [2021-06-12 22:04:16,000 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:16,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033024856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:16,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:16,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:04:16,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318633312] [2021-06-12 22:04:16,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:16,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:16,095 INFO L87 Difference]: Start difference. First operand 13406 states and 51922 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:16,697 INFO L93 Difference]: Finished difference Result 21469 states and 77902 transitions. [2021-06-12 22:04:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:04:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:16,749 INFO L225 Difference]: With dead ends: 21469 [2021-06-12 22:04:16,749 INFO L226 Difference]: Without dead ends: 21456 [2021-06-12 22:04:16,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:04:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21456 states. [2021-06-12 22:04:17,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21456 to 13488. [2021-06-12 22:04:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13488 states, 13487 states have (on average 3.879068732853859) internal successors, (52317), 13487 states have internal predecessors, (52317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13488 states to 13488 states and 52317 transitions. [2021-06-12 22:04:17,067 INFO L78 Accepts]: Start accepts. Automaton has 13488 states and 52317 transitions. Word has length 28 [2021-06-12 22:04:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:17,067 INFO L482 AbstractCegarLoop]: Abstraction has 13488 states and 52317 transitions. [2021-06-12 22:04:17,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 13488 states and 52317 transitions. [2021-06-12 22:04:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:17,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:17,087 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:17,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5848,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:17,287 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1159260233, now seen corresponding path program 110 times [2021-06-12 22:04:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:17,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850335385] [2021-06-12 22:04:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:17,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:17,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850335385] [2021-06-12 22:04:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850335385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214434322] [2021-06-12 22:04:17,314 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:17,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:17,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214434322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:17,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:17,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:04:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053265145] [2021-06-12 22:04:17,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:17,417 INFO L87 Difference]: Start difference. First operand 13488 states and 52317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:18,078 INFO L93 Difference]: Finished difference Result 22765 states and 81941 transitions. [2021-06-12 22:04:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:04:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:18,119 INFO L225 Difference]: With dead ends: 22765 [2021-06-12 22:04:18,119 INFO L226 Difference]: Without dead ends: 22765 [2021-06-12 22:04:18,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:04:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22765 states. [2021-06-12 22:04:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22765 to 13512. [2021-06-12 22:04:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.8755828584116645) internal successors, (52363), 13511 states have internal predecessors, (52363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52363 transitions. [2021-06-12 22:04:18,490 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52363 transitions. Word has length 28 [2021-06-12 22:04:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:18,490 INFO L482 AbstractCegarLoop]: Abstraction has 13512 states and 52363 transitions. [2021-06-12 22:04:18,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52363 transitions. [2021-06-12 22:04:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:18,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:18,512 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5849 [2021-06-12 22:04:18,717 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1083104517, now seen corresponding path program 83 times [2021-06-12 22:04:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:18,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533199455] [2021-06-12 22:04:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:18,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:18,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533199455] [2021-06-12 22:04:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533199455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491468021] [2021-06-12 22:04:18,749 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:18,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:04:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491468021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:18,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:18,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:04:18,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043837749] [2021-06-12 22:04:18,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:18,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:18,850 INFO L87 Difference]: Start difference. First operand 13512 states and 52363 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:19,731 INFO L93 Difference]: Finished difference Result 23563 states and 86937 transitions. [2021-06-12 22:04:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:04:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:19,777 INFO L225 Difference]: With dead ends: 23563 [2021-06-12 22:04:19,777 INFO L226 Difference]: Without dead ends: 23559 [2021-06-12 22:04:19,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:04:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23559 states. [2021-06-12 22:04:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23559 to 13808. [2021-06-12 22:04:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 13807 states have (on average 3.86390961106685) internal successors, (53349), 13807 states have internal predecessors, (53349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 53349 transitions. [2021-06-12 22:04:20,115 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 53349 transitions. Word has length 28 [2021-06-12 22:04:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:20,115 INFO L482 AbstractCegarLoop]: Abstraction has 13808 states and 53349 transitions. [2021-06-12 22:04:20,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 53349 transitions. [2021-06-12 22:04:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:20,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:20,135 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:20,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5850 [2021-06-12 22:04:20,336 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash -217720579, now seen corresponding path program 111 times [2021-06-12 22:04:20,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:20,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521076076] [2021-06-12 22:04:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:20,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521076076] [2021-06-12 22:04:20,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521076076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:20,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921509069] [2021-06-12 22:04:20,366 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:20,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:04:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921509069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:20,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:20,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:04:20,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699661118] [2021-06-12 22:04:20,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:20,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:20,455 INFO L87 Difference]: Start difference. First operand 13808 states and 53349 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:21,108 INFO L93 Difference]: Finished difference Result 20031 states and 73742 transitions. [2021-06-12 22:04:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:04:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:21,149 INFO L225 Difference]: With dead ends: 20031 [2021-06-12 22:04:21,149 INFO L226 Difference]: Without dead ends: 20008 [2021-06-12 22:04:21,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:04:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20008 states. [2021-06-12 22:04:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20008 to 13828. [2021-06-12 22:04:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13828 states, 13827 states have (on average 3.8711217183770885) internal successors, (53526), 13827 states have internal predecessors, (53526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13828 states to 13828 states and 53526 transitions. [2021-06-12 22:04:21,516 INFO L78 Accepts]: Start accepts. Automaton has 13828 states and 53526 transitions. Word has length 28 [2021-06-12 22:04:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:21,516 INFO L482 AbstractCegarLoop]: Abstraction has 13828 states and 53526 transitions. [2021-06-12 22:04:21,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13828 states and 53526 transitions. [2021-06-12 22:04:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:21,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:21,536 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:21,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5851,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:21,736 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash -900464909, now seen corresponding path program 112 times [2021-06-12 22:04:21,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:21,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291416941] [2021-06-12 22:04:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:21,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:21,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291416941] [2021-06-12 22:04:21,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291416941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:21,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660827287] [2021-06-12 22:04:21,767 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:21,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:21,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660827287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:21,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:21,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:04:21,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362838556] [2021-06-12 22:04:21,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:21,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:21,867 INFO L87 Difference]: Start difference. First operand 13828 states and 53526 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:22,572 INFO L93 Difference]: Finished difference Result 19483 states and 70764 transitions. [2021-06-12 22:04:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:04:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:22,609 INFO L225 Difference]: With dead ends: 19483 [2021-06-12 22:04:22,609 INFO L226 Difference]: Without dead ends: 19483 [2021-06-12 22:04:22,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:04:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19483 states. [2021-06-12 22:04:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19483 to 13783. [2021-06-12 22:04:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13783 states, 13782 states have (on average 3.8633725148744738) internal successors, (53245), 13782 states have internal predecessors, (53245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13783 states to 13783 states and 53245 transitions. [2021-06-12 22:04:22,894 INFO L78 Accepts]: Start accepts. Automaton has 13783 states and 53245 transitions. Word has length 28 [2021-06-12 22:04:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:22,894 INFO L482 AbstractCegarLoop]: Abstraction has 13783 states and 53245 transitions. [2021-06-12 22:04:22,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 13783 states and 53245 transitions. [2021-06-12 22:04:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:22,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:22,914 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:23,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:23,114 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1220583373, now seen corresponding path program 113 times [2021-06-12 22:04:23,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:23,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840628920] [2021-06-12 22:04:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:23,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:23,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840628920] [2021-06-12 22:04:23,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840628920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:23,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858765513] [2021-06-12 22:04:23,144 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:23,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:04:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858765513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:23,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:23,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:04:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043862647] [2021-06-12 22:04:23,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:23,234 INFO L87 Difference]: Start difference. First operand 13783 states and 53245 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:23,856 INFO L93 Difference]: Finished difference Result 20772 states and 75881 transitions. [2021-06-12 22:04:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:04:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:23,895 INFO L225 Difference]: With dead ends: 20772 [2021-06-12 22:04:23,895 INFO L226 Difference]: Without dead ends: 20772 [2021-06-12 22:04:23,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:04:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20772 states. [2021-06-12 22:04:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20772 to 14496. [2021-06-12 22:04:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14496 states, 14495 states have (on average 3.84932735426009) internal successors, (55796), 14495 states have internal predecessors, (55796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14496 states to 14496 states and 55796 transitions. [2021-06-12 22:04:24,269 INFO L78 Accepts]: Start accepts. Automaton has 14496 states and 55796 transitions. Word has length 28 [2021-06-12 22:04:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:24,270 INFO L482 AbstractCegarLoop]: Abstraction has 14496 states and 55796 transitions. [2021-06-12 22:04:24,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14496 states and 55796 transitions. [2021-06-12 22:04:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:24,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:24,290 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:24,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5853 [2021-06-12 22:04:24,491 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:24,491 INFO L82 PathProgramCache]: Analyzing trace with hash -331180409, now seen corresponding path program 114 times [2021-06-12 22:04:24,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:24,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424627797] [2021-06-12 22:04:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:24,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424627797] [2021-06-12 22:04:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424627797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12450641] [2021-06-12 22:04:24,521 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:24,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:04:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:24,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:24,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:24,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12450641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:24,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:24,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:04:24,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362732700] [2021-06-12 22:04:24,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:24,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:24,621 INFO L87 Difference]: Start difference. First operand 14496 states and 55796 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:25,445 INFO L93 Difference]: Finished difference Result 23301 states and 83849 transitions. [2021-06-12 22:04:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:04:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:25,489 INFO L225 Difference]: With dead ends: 23301 [2021-06-12 22:04:25,489 INFO L226 Difference]: Without dead ends: 23301 [2021-06-12 22:04:25,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:04:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23301 states. [2021-06-12 22:04:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23301 to 14726. [2021-06-12 22:04:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14726 states, 14725 states have (on average 3.8604414261460103) internal successors, (56845), 14725 states have internal predecessors, (56845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14726 states to 14726 states and 56845 transitions. [2021-06-12 22:04:25,801 INFO L78 Accepts]: Start accepts. Automaton has 14726 states and 56845 transitions. Word has length 28 [2021-06-12 22:04:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:25,801 INFO L482 AbstractCegarLoop]: Abstraction has 14726 states and 56845 transitions. [2021-06-12 22:04:25,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 14726 states and 56845 transitions. [2021-06-12 22:04:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:25,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:25,822 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:26,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5854,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:26,023 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1653713447, now seen corresponding path program 84 times [2021-06-12 22:04:26,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:26,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676080876] [2021-06-12 22:04:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:26,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:26,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676080876] [2021-06-12 22:04:26,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676080876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:26,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562048652] [2021-06-12 22:04:26,056 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:26,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:04:26,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562048652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:26,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:26,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:26,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414228392] [2021-06-12 22:04:26,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:26,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:26,175 INFO L87 Difference]: Start difference. First operand 14726 states and 56845 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:04:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:27,692 INFO L93 Difference]: Finished difference Result 41437 states and 148960 transitions. [2021-06-12 22:04:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:04:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:04:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:27,774 INFO L225 Difference]: With dead ends: 41437 [2021-06-12 22:04:27,775 INFO L226 Difference]: Without dead ends: 41437 [2021-06-12 22:04:27,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:04:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41437 states. [2021-06-12 22:04:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41437 to 16084. [2021-06-12 22:04:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16084 states, 16083 states have (on average 3.9069825281352983) internal successors, (62836), 16083 states have internal predecessors, (62836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16084 states to 16084 states and 62836 transitions. [2021-06-12 22:04:28,300 INFO L78 Accepts]: Start accepts. Automaton has 16084 states and 62836 transitions. Word has length 28 [2021-06-12 22:04:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:28,300 INFO L482 AbstractCegarLoop]: Abstraction has 16084 states and 62836 transitions. [2021-06-12 22:04:28,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:04:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16084 states and 62836 transitions. [2021-06-12 22:04:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:28,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:28,324 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:28,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5855,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:28,524 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1086761367, now seen corresponding path program 85 times [2021-06-12 22:04:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299295292] [2021-06-12 22:04:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:28,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299295292] [2021-06-12 22:04:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299295292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476547637] [2021-06-12 22:04:28,562 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:28,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476547637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:28,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:28,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763759005] [2021-06-12 22:04:28,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:28,681 INFO L87 Difference]: Start difference. First operand 16084 states and 62836 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:04:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:30,106 INFO L93 Difference]: Finished difference Result 40385 states and 146224 transitions. [2021-06-12 22:04:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:04:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:04:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:30,192 INFO L225 Difference]: With dead ends: 40385 [2021-06-12 22:04:30,192 INFO L226 Difference]: Without dead ends: 40385 [2021-06-12 22:04:30,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:04:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40385 states. [2021-06-12 22:04:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40385 to 16052. [2021-06-12 22:04:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16052 states, 16051 states have (on average 3.9033082050962555) internal successors, (62652), 16051 states have internal predecessors, (62652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16052 states to 16052 states and 62652 transitions. [2021-06-12 22:04:30,773 INFO L78 Accepts]: Start accepts. Automaton has 16052 states and 62652 transitions. Word has length 28 [2021-06-12 22:04:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:30,773 INFO L482 AbstractCegarLoop]: Abstraction has 16052 states and 62652 transitions. [2021-06-12 22:04:30,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:04:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16052 states and 62652 transitions. [2021-06-12 22:04:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:30,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:30,796 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:30,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-12 22:04:30,996 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1368987715, now seen corresponding path program 115 times [2021-06-12 22:04:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735492120] [2021-06-12 22:04:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:31,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735492120] [2021-06-12 22:04:31,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735492120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818875647] [2021-06-12 22:04:31,028 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818875647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:31,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:31,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:31,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142784920] [2021-06-12 22:04:31,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:31,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:31,102 INFO L87 Difference]: Start difference. First operand 16052 states and 62652 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:31,354 INFO L93 Difference]: Finished difference Result 24998 states and 96107 transitions. [2021-06-12 22:04:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:04:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:31,409 INFO L225 Difference]: With dead ends: 24998 [2021-06-12 22:04:31,409 INFO L226 Difference]: Without dead ends: 24951 [2021-06-12 22:04:31,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:04:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24951 states. [2021-06-12 22:04:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 20735. [2021-06-12 22:04:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20735 states, 20734 states have (on average 3.910244043599884) internal successors, (81075), 20734 states have internal predecessors, (81075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20735 states to 20735 states and 81075 transitions. [2021-06-12 22:04:31,800 INFO L78 Accepts]: Start accepts. Automaton has 20735 states and 81075 transitions. Word has length 28 [2021-06-12 22:04:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:31,801 INFO L482 AbstractCegarLoop]: Abstraction has 20735 states and 81075 transitions. [2021-06-12 22:04:31,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20735 states and 81075 transitions. [2021-06-12 22:04:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:31,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:31,829 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:32,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5857,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:32,030 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash 541079027, now seen corresponding path program 116 times [2021-06-12 22:04:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:32,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022037630] [2021-06-12 22:04:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:32,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022037630] [2021-06-12 22:04:32,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022037630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905160724] [2021-06-12 22:04:32,060 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:32,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:32,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905160724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:32,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:32,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:04:32,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665318254] [2021-06-12 22:04:32,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:32,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:32,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:32,136 INFO L87 Difference]: Start difference. First operand 20735 states and 81075 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:32,379 INFO L93 Difference]: Finished difference Result 23483 states and 89423 transitions. [2021-06-12 22:04:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:04:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:32,425 INFO L225 Difference]: With dead ends: 23483 [2021-06-12 22:04:32,425 INFO L226 Difference]: Without dead ends: 23483 [2021-06-12 22:04:32,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:04:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23483 states. [2021-06-12 22:04:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23483 to 20238. [2021-06-12 22:04:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20238 states, 20237 states have (on average 3.89894747245145) internal successors, (78903), 20237 states have internal predecessors, (78903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20238 states to 20238 states and 78903 transitions. [2021-06-12 22:04:32,874 INFO L78 Accepts]: Start accepts. Automaton has 20238 states and 78903 transitions. Word has length 28 [2021-06-12 22:04:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:32,875 INFO L482 AbstractCegarLoop]: Abstraction has 20238 states and 78903 transitions. [2021-06-12 22:04:32,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 20238 states and 78903 transitions. [2021-06-12 22:04:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:32,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:32,902 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:33,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5858 [2021-06-12 22:04:33,103 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:33,103 INFO L82 PathProgramCache]: Analyzing trace with hash -410602411, now seen corresponding path program 117 times [2021-06-12 22:04:33,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:33,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512042215] [2021-06-12 22:04:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512042215] [2021-06-12 22:04:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512042215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636011149] [2021-06-12 22:04:33,138 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:04:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:33,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636011149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:33,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:33,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:04:33,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736937805] [2021-06-12 22:04:33,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:04:33,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:04:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:04:33,242 INFO L87 Difference]: Start difference. First operand 20238 states and 78903 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:34,111 INFO L93 Difference]: Finished difference Result 32137 states and 119230 transitions. [2021-06-12 22:04:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:04:34,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:34,181 INFO L225 Difference]: With dead ends: 32137 [2021-06-12 22:04:34,181 INFO L226 Difference]: Without dead ends: 32137 [2021-06-12 22:04:34,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:04:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2021-06-12 22:04:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 20300. [2021-06-12 22:04:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20300 states, 20299 states have (on average 3.8972855805704714) internal successors, (79111), 20299 states have internal predecessors, (79111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20300 states to 20300 states and 79111 transitions. [2021-06-12 22:04:34,634 INFO L78 Accepts]: Start accepts. Automaton has 20300 states and 79111 transitions. Word has length 28 [2021-06-12 22:04:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:34,634 INFO L482 AbstractCegarLoop]: Abstraction has 20300 states and 79111 transitions. [2021-06-12 22:04:34,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20300 states and 79111 transitions. [2021-06-12 22:04:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:34,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:34,662 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:34,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5859,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:34,870 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1386921255, now seen corresponding path program 118 times [2021-06-12 22:04:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:34,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203258895] [2021-06-12 22:04:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:34,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203258895] [2021-06-12 22:04:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203258895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043392971] [2021-06-12 22:04:34,905 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:35,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043392971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:35,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:35,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:04:35,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052370698] [2021-06-12 22:04:35,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:35,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:35,121 INFO L87 Difference]: Start difference. First operand 20300 states and 79111 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:36,552 INFO L93 Difference]: Finished difference Result 41281 states and 151393 transitions. [2021-06-12 22:04:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:04:36,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:36,644 INFO L225 Difference]: With dead ends: 41281 [2021-06-12 22:04:36,644 INFO L226 Difference]: Without dead ends: 41281 [2021-06-12 22:04:36,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:04:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41281 states. [2021-06-12 22:04:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41281 to 20305. [2021-06-12 22:04:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20305 states, 20304 states have (on average 3.899330181245075) internal successors, (79172), 20304 states have internal predecessors, (79172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20305 states to 20305 states and 79172 transitions. [2021-06-12 22:04:37,216 INFO L78 Accepts]: Start accepts. Automaton has 20305 states and 79172 transitions. Word has length 28 [2021-06-12 22:04:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:37,216 INFO L482 AbstractCegarLoop]: Abstraction has 20305 states and 79172 transitions. [2021-06-12 22:04:37,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 20305 states and 79172 transitions. [2021-06-12 22:04:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:37,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:37,245 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:37,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5860 [2021-06-12 22:04:37,446 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash -819969175, now seen corresponding path program 119 times [2021-06-12 22:04:37,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:37,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984127945] [2021-06-12 22:04:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:37,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984127945] [2021-06-12 22:04:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984127945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978526098] [2021-06-12 22:04:37,482 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:37,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:04:37,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:37,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978526098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:37,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:37,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:04:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983304786] [2021-06-12 22:04:37,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:37,697 INFO L87 Difference]: Start difference. First operand 20305 states and 79172 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:39,051 INFO L93 Difference]: Finished difference Result 40959 states and 150883 transitions. [2021-06-12 22:04:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:04:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:39,144 INFO L225 Difference]: With dead ends: 40959 [2021-06-12 22:04:39,144 INFO L226 Difference]: Without dead ends: 40959 [2021-06-12 22:04:39,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:04:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40959 states. [2021-06-12 22:04:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40959 to 20093. [2021-06-12 22:04:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20093 states, 20092 states have (on average 3.8916484172805097) internal successors, (78191), 20092 states have internal predecessors, (78191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 78191 transitions. [2021-06-12 22:04:39,708 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 78191 transitions. Word has length 28 [2021-06-12 22:04:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:39,708 INFO L482 AbstractCegarLoop]: Abstraction has 20093 states and 78191 transitions. [2021-06-12 22:04:39,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 78191 transitions. [2021-06-12 22:04:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:39,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:39,738 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:39,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5861,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:39,952 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:39,952 INFO L82 PathProgramCache]: Analyzing trace with hash 116169497, now seen corresponding path program 120 times [2021-06-12 22:04:39,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:39,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430392495] [2021-06-12 22:04:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:39,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:39,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430392495] [2021-06-12 22:04:39,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430392495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:39,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719204623] [2021-06-12 22:04:39,979 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:40,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:04:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:40,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:04:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:04:40,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719204623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:40,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:40,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:04:40,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448751769] [2021-06-12 22:04:40,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:40,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:40,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:40,070 INFO L87 Difference]: Start difference. First operand 20093 states and 78191 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:40,472 INFO L93 Difference]: Finished difference Result 29554 states and 110558 transitions. [2021-06-12 22:04:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:04:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:40,542 INFO L225 Difference]: With dead ends: 29554 [2021-06-12 22:04:40,542 INFO L226 Difference]: Without dead ends: 29537 [2021-06-12 22:04:40,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:04:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29537 states. [2021-06-12 22:04:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29537 to 20364. [2021-06-12 22:04:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20364 states, 20363 states have (on average 3.8971173206305556) internal successors, (79357), 20363 states have internal predecessors, (79357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20364 states to 20364 states and 79357 transitions. [2021-06-12 22:04:40,994 INFO L78 Accepts]: Start accepts. Automaton has 20364 states and 79357 transitions. Word has length 28 [2021-06-12 22:04:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:40,994 INFO L482 AbstractCegarLoop]: Abstraction has 20364 states and 79357 transitions. [2021-06-12 22:04:40,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 20364 states and 79357 transitions. [2021-06-12 22:04:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:41,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:41,024 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:41,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5862,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:41,237 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1026756543, now seen corresponding path program 121 times [2021-06-12 22:04:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:41,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139059868] [2021-06-12 22:04:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:41,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139059868] [2021-06-12 22:04:41,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139059868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128284783] [2021-06-12 22:04:41,264 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:04:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:04:41,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128284783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:41,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:41,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:04:41,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625663157] [2021-06-12 22:04:41,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:41,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:41,354 INFO L87 Difference]: Start difference. First operand 20364 states and 79357 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:41,639 INFO L93 Difference]: Finished difference Result 31323 states and 116077 transitions. [2021-06-12 22:04:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:04:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:41,710 INFO L225 Difference]: With dead ends: 31323 [2021-06-12 22:04:41,710 INFO L226 Difference]: Without dead ends: 31323 [2021-06-12 22:04:41,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:04:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-12 22:04:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 20033. [2021-06-12 22:04:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20033 states, 20032 states have (on average 3.8823382587859423) internal successors, (77771), 20032 states have internal predecessors, (77771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20033 states to 20033 states and 77771 transitions. [2021-06-12 22:04:42,163 INFO L78 Accepts]: Start accepts. Automaton has 20033 states and 77771 transitions. Word has length 28 [2021-06-12 22:04:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:42,164 INFO L482 AbstractCegarLoop]: Abstraction has 20033 states and 77771 transitions. [2021-06-12 22:04:42,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 20033 states and 77771 transitions. [2021-06-12 22:04:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:42,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:42,193 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:42,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5863,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:42,410 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1921529187, now seen corresponding path program 122 times [2021-06-12 22:04:42,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:42,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283539282] [2021-06-12 22:04:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:42,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:42,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283539282] [2021-06-12 22:04:42,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283539282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:42,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53435858] [2021-06-12 22:04:42,564 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:42,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:42,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53435858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:42,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:42,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:04:42,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542896062] [2021-06-12 22:04:42,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:42,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:42,657 INFO L87 Difference]: Start difference. First operand 20033 states and 77771 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:43,397 INFO L93 Difference]: Finished difference Result 29652 states and 110343 transitions. [2021-06-12 22:04:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:04:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:43,464 INFO L225 Difference]: With dead ends: 29652 [2021-06-12 22:04:43,465 INFO L226 Difference]: Without dead ends: 29652 [2021-06-12 22:04:43,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:04:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29652 states. [2021-06-12 22:04:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29652 to 20077. [2021-06-12 22:04:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20077 states, 20076 states have (on average 3.881002191671648) internal successors, (77915), 20076 states have internal predecessors, (77915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20077 states to 20077 states and 77915 transitions. [2021-06-12 22:04:43,906 INFO L78 Accepts]: Start accepts. Automaton has 20077 states and 77915 transitions. Word has length 28 [2021-06-12 22:04:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:43,907 INFO L482 AbstractCegarLoop]: Abstraction has 20077 states and 77915 transitions. [2021-06-12 22:04:43,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 20077 states and 77915 transitions. [2021-06-12 22:04:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:43,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:43,934 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:44,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5864,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:44,135 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1588524015, now seen corresponding path program 123 times [2021-06-12 22:04:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:44,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981756037] [2021-06-12 22:04:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:44,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:44,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981756037] [2021-06-12 22:04:44,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981756037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:44,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033940562] [2021-06-12 22:04:44,169 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:44,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:04:44,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:44,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033940562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:44,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:44,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:04:44,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836415403] [2021-06-12 22:04:44,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:44,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:44,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:44,262 INFO L87 Difference]: Start difference. First operand 20077 states and 77915 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:45,264 INFO L93 Difference]: Finished difference Result 31294 states and 115097 transitions. [2021-06-12 22:04:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:04:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:45,338 INFO L225 Difference]: With dead ends: 31294 [2021-06-12 22:04:45,338 INFO L226 Difference]: Without dead ends: 31294 [2021-06-12 22:04:45,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:04:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31294 states. [2021-06-12 22:04:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31294 to 20595. [2021-06-12 22:04:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20595 states, 20594 states have (on average 3.8609303680683693) internal successors, (79512), 20594 states have internal predecessors, (79512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 79512 transitions. [2021-06-12 22:04:45,834 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 79512 transitions. Word has length 28 [2021-06-12 22:04:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:45,834 INFO L482 AbstractCegarLoop]: Abstraction has 20595 states and 79512 transitions. [2021-06-12 22:04:45,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 79512 transitions. [2021-06-12 22:04:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:45,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:45,864 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:46,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:46,069 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1633345157, now seen corresponding path program 124 times [2021-06-12 22:04:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:46,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643896654] [2021-06-12 22:04:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:46,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643896654] [2021-06-12 22:04:46,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643896654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757978762] [2021-06-12 22:04:46,103 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:46,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757978762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:46,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:46,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:04:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987114981] [2021-06-12 22:04:46,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:46,189 INFO L87 Difference]: Start difference. First operand 20595 states and 79512 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:47,005 INFO L93 Difference]: Finished difference Result 30356 states and 112645 transitions. [2021-06-12 22:04:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:04:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:47,070 INFO L225 Difference]: With dead ends: 30356 [2021-06-12 22:04:47,070 INFO L226 Difference]: Without dead ends: 30352 [2021-06-12 22:04:47,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:04:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30352 states. [2021-06-12 22:04:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30352 to 20487. [2021-06-12 22:04:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20487 states, 20486 states have (on average 3.863711803182661) internal successors, (79152), 20486 states have internal predecessors, (79152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20487 states to 20487 states and 79152 transitions. [2021-06-12 22:04:47,586 INFO L78 Accepts]: Start accepts. Automaton has 20487 states and 79152 transitions. Word has length 28 [2021-06-12 22:04:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:47,586 INFO L482 AbstractCegarLoop]: Abstraction has 20487 states and 79152 transitions. [2021-06-12 22:04:47,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 20487 states and 79152 transitions. [2021-06-12 22:04:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:47,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:47,614 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:47,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:47,814 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash -767961219, now seen corresponding path program 125 times [2021-06-12 22:04:47,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:47,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064336198] [2021-06-12 22:04:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064336198] [2021-06-12 22:04:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064336198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229418019] [2021-06-12 22:04:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:47,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:04:47,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:04:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:04:47,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229418019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:47,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:47,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:04:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057292675] [2021-06-12 22:04:47,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:04:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:04:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:04:47,935 INFO L87 Difference]: Start difference. First operand 20487 states and 79152 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:48,152 INFO L93 Difference]: Finished difference Result 25467 states and 94990 transitions. [2021-06-12 22:04:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:04:48,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:48,204 INFO L225 Difference]: With dead ends: 25467 [2021-06-12 22:04:48,204 INFO L226 Difference]: Without dead ends: 25467 [2021-06-12 22:04:48,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:04:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25467 states. [2021-06-12 22:04:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25467 to 20797. [2021-06-12 22:04:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20797 states, 20796 states have (on average 3.854827851509906) internal successors, (80165), 20796 states have internal predecessors, (80165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20797 states to 20797 states and 80165 transitions. [2021-06-12 22:04:48,588 INFO L78 Accepts]: Start accepts. Automaton has 20797 states and 80165 transitions. Word has length 28 [2021-06-12 22:04:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:48,589 INFO L482 AbstractCegarLoop]: Abstraction has 20797 states and 80165 transitions. [2021-06-12 22:04:48,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 20797 states and 80165 transitions. [2021-06-12 22:04:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:48,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:48,618 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:48,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5867,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:48,818 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 162238525, now seen corresponding path program 126 times [2021-06-12 22:04:48,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:48,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888256049] [2021-06-12 22:04:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:48,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:48,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888256049] [2021-06-12 22:04:48,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888256049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:48,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812740063] [2021-06-12 22:04:48,853 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:48,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:04:48,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:48,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:04:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812740063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:04:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936395092] [2021-06-12 22:04:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:48,935 INFO L87 Difference]: Start difference. First operand 20797 states and 80165 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:49,749 INFO L93 Difference]: Finished difference Result 31245 states and 114624 transitions. [2021-06-12 22:04:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:04:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:49,815 INFO L225 Difference]: With dead ends: 31245 [2021-06-12 22:04:49,815 INFO L226 Difference]: Without dead ends: 31245 [2021-06-12 22:04:49,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:04:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31245 states. [2021-06-12 22:04:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31245 to 22412. [2021-06-12 22:04:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22412 states, 22411 states have (on average 3.866538753290795) internal successors, (86653), 22411 states have internal predecessors, (86653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22412 states to 22412 states and 86653 transitions. [2021-06-12 22:04:50,295 INFO L78 Accepts]: Start accepts. Automaton has 22412 states and 86653 transitions. Word has length 28 [2021-06-12 22:04:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:50,295 INFO L482 AbstractCegarLoop]: Abstraction has 22412 states and 86653 transitions. [2021-06-12 22:04:50,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22412 states and 86653 transitions. [2021-06-12 22:04:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:50,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:50,327 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:50,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5868,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:50,528 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1677533803, now seen corresponding path program 127 times [2021-06-12 22:04:50,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:50,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273637464] [2021-06-12 22:04:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:50,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273637464] [2021-06-12 22:04:50,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273637464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929647818] [2021-06-12 22:04:50,562 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:50,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:04:50,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929647818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:50,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:50,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:04:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203368743] [2021-06-12 22:04:50,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:50,649 INFO L87 Difference]: Start difference. First operand 22412 states and 86653 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:51,319 INFO L93 Difference]: Finished difference Result 29507 states and 110143 transitions. [2021-06-12 22:04:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:04:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:51,382 INFO L225 Difference]: With dead ends: 29507 [2021-06-12 22:04:51,382 INFO L226 Difference]: Without dead ends: 29495 [2021-06-12 22:04:51,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:04:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29495 states. [2021-06-12 22:04:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29495 to 22542. [2021-06-12 22:04:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.861763009626902) internal successors, (87048), 22541 states have internal predecessors, (87048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87048 transitions. [2021-06-12 22:04:51,926 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87048 transitions. Word has length 28 [2021-06-12 22:04:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:51,926 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 87048 transitions. [2021-06-12 22:04:51,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87048 transitions. [2021-06-12 22:04:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:51,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:51,959 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-06-12 22:04:52,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5869,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:52,159 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1986650177, now seen corresponding path program 128 times [2021-06-12 22:04:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:52,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498692672] [2021-06-12 22:04:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-12 22:04:52,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188316949] [2021-06-12 22:04:52,162 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:52,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:04:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:52,191 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 22:04:52,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5870 [2021-06-12 22:04:52,391 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:04:52,393 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:04:52,394 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:04:52,394 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:04:52 BasicIcfg [2021-06-12 22:04:52,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:04:52,395 INFO L168 Benchmark]: Toolchain (without parser) took 866118.53 ms. Allocated memory was 199.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 178.1 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 908.5 MB. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.12 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 INFO L168 Benchmark]: Boogie Preprocessor took 10.46 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 175.5 MB in the end (delta: 988.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 INFO L168 Benchmark]: RCFGBuilder took 271.18 ms. Allocated memory is still 199.2 MB. Free memory was 175.5 MB in the beginning and 162.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 INFO L168 Benchmark]: TraceAbstraction took 865813.57 ms. Allocated memory was 199.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 161.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 892.8 MB. Max. memory is 8.0 GB. [2021-06-12 22:04:52,395 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 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.12 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.46 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 175.5 MB in the end (delta: 988.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 271.18 ms. Allocated memory is still 199.2 MB. Free memory was 175.5 MB in the beginning and 162.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 865813.57 ms. Allocated memory was 199.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 161.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 892.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 865686.8ms, OverallIterations: 216, TraceHistogramMax: 3, EmptinessCheckTime: 1412.6ms, AutomataDifference: 639336.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9700 SDtfs, 53528 SDslu, 72368 SDs, 0 SdLazy, 121201 SolverSat, 9282 SolverUnsat, 255 SolverUnknown, 0 SolverNotchecked, 396529.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13229 GetRequests, 4400 SyntacticMatches, 270 SemanticMatches, 8559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134283 ImplicationChecksByTransitivity, 302197.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22542occurred in iteration=215, InterpolantAutomatonStates: 7451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22400.3ms AutomataMinimizationTime, 215 MinimizatonAttempts, 681749 StatesRemovedByMinimization, 215 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 641.8ms SsaConstructionTime, 1832.1ms SatisfiabilityAnalysisTime, 151863.4ms InterpolantComputationTime, 11258 NumberOfCodeBlocks, 11258 NumberOfCodeBlocksAsserted, 731 NumberOfCheckSat, 10831 ConstructedInterpolants, 128 QuantifiedInterpolants, 134680 SizeOfPredicates, 1121 NumberOfNonLiveVariables, 14212 ConjunctsInSsa, 3306 ConjunctsInUnsatCore, 427 InterpolantComputations, 3 PerfectInterpolantSequences, 680/3382 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown