/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-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:32:22,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:32:22,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:32:22,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:32:22,835 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 21:32:22,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:32:22,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:32:22,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:32:22,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:32:22,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:32:22,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:32:22,870 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:32:22,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:32:22,870 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:32:22,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:32:22,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:32:22,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:32:22,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:32:22,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:32:22,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:32:22,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:32:23,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:32:23,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:32:23,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:32:23,137 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:32:23,137 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:32:23,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2021-06-12 21:32:23,138 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2021-06-12 21:32:23,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:32:23,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:32:23,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:32:23,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:32:23,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:32:23,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:32:23,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:32:23,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:32:23,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:32:23,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/1) ... [2021-06-12 21:32:23,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:32:23,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:32:23,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:32:23,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:32:23,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (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 21:32:23,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:32:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:32:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:32:23,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:32:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:32:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:32:23,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:32:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:32:23,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:32:23,267 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:32:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:32:23,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:32:23,267 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 21:32:23,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:32:23,394 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:32:23,395 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:32:23 BoogieIcfgContainer [2021-06-12 21:32:23,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:32:23,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:32:23,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:32:23,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:32:23,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:32:23" (1/2) ... [2021-06-12 21:32:23,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7133a65c and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:32:23, skipping insertion in model container [2021-06-12 21:32:23,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:32:23" (2/2) ... [2021-06-12 21:32:23,400 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-06-12 21:32:23,403 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:32:23,403 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:32:23,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:32:23,404 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:32:23,430 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:32:23,444 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:32:23,473 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:32:23,473 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:32:23,473 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:32:23,473 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:32:23,473 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:32:23,473 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:32:23,473 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:32:23,474 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:32:23,479 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-12 21:32:23,542 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:32:23,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:23,552 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 21:32:23,552 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash 761048342, now seen corresponding path program 1 times [2021-06-12 21:32:23,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:23,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607296705] [2021-06-12 21:32:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:23,717 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 21:32:23,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607296705] [2021-06-12 21:32:23,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607296705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:32:23,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:32:23,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:32:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031285192] [2021-06-12 21:32:23,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:32:23,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:32:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:32:23,744 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 21:32:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:23,795 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-12 21:32:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:32:23,796 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 21:32:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:23,813 INFO L225 Difference]: With dead ends: 298 [2021-06-12 21:32:23,813 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 21:32:23,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:32:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 21:32:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-12 21:32:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-12 21:32:23,881 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-12 21:32:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:23,881 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-12 21:32:23,881 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 21:32:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-12 21:32:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:32:23,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:23,883 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] [2021-06-12 21:32:23,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:32:23,883 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:23,884 INFO L82 PathProgramCache]: Analyzing trace with hash 995802333, now seen corresponding path program 1 times [2021-06-12 21:32:23,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:23,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299951508] [2021-06-12 21:32:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:23,928 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 21:32:23,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:23,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299951508] [2021-06-12 21:32:23,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299951508] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:32:23,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:32:23,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:32:23,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288446459] [2021-06-12 21:32:23,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:32:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:32:23,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:32:23,931 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:23,963 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-06-12 21:32:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:32:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:32:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:23,965 INFO L225 Difference]: With dead ends: 249 [2021-06-12 21:32:23,965 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 21:32:23,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:32:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 21:32:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-12 21:32:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-06-12 21:32:23,973 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-06-12 21:32:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:23,973 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-06-12 21:32:23,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-06-12 21:32:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:32:23,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:23,975 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] [2021-06-12 21:32:23,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:32:23,975 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 691559827, now seen corresponding path program 1 times [2021-06-12 21:32:23,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:23,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200011355] [2021-06-12 21:32:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:24,027 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 21:32:24,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:24,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200011355] [2021-06-12 21:32:24,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200011355] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:32:24,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:32:24,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:32:24,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131741400] [2021-06-12 21:32:24,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:32:24,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:32:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:32:24,029 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:24,072 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-06-12 21:32:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:32:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:32:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:24,076 INFO L225 Difference]: With dead ends: 332 [2021-06-12 21:32:24,076 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 21:32:24,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:32:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 21:32:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-06-12 21:32:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-06-12 21:32:24,085 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-06-12 21:32:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:24,085 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-06-12 21:32:24,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-06-12 21:32:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:24,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:24,087 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 21:32:24,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:32:24,087 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:24,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2040947820, now seen corresponding path program 1 times [2021-06-12 21:32:24,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:24,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450232390] [2021-06-12 21:32:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:24,396 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 21:32:24,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:24,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450232390] [2021-06-12 21:32:24,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450232390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:24,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892577573] [2021-06-12 21:32:24,398 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 21:32:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:24,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:24,720 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 21:32:24,728 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 21:32:24,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:24,738 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 21:32:24,743 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 21:32:24,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,751 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 21:32:24,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,761 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 21:32:24,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-12 21:32:24,782 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 21:32:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892577573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:24,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:24,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 21:32:24,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141079648] [2021-06-12 21:32:24,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:32:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:32:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:32:24,784 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 21:32:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:24,968 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-06-12 21:32:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:32:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 21:32:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:24,971 INFO L225 Difference]: With dead ends: 426 [2021-06-12 21:32:24,971 INFO L226 Difference]: Without dead ends: 411 [2021-06-12 21:32:24,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-12 21:32:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-06-12 21:32:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-06-12 21:32:24,982 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-06-12 21:32:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:24,982 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-06-12 21:32:24,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 21:32:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-06-12 21:32:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:24,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:24,984 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 21:32:25,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:25,201 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1459009098, now seen corresponding path program 2 times [2021-06-12 21:32:25,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:25,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268575987] [2021-06-12 21:32:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:25,425 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 21:32:25,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268575987] [2021-06-12 21:32:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268575987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901437544] [2021-06-12 21:32:25,425 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) [2021-06-12 21:32:25,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:25,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:25,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,589 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 21:32:25,620 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 21:32:25,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,634 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 21:32:25,656 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 21:32:25,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,675 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 21:32:25,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:32:25,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:25,712 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 21:32:25,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-12 21:32:25,764 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 21:32:25,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901437544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:25,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:25,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 21:32:25,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72782855] [2021-06-12 21:32:25,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:25,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:25,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:25,766 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 21:32:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:26,231 INFO L93 Difference]: Finished difference Result 616 states and 1755 transitions. [2021-06-12 21:32:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-12 21:32:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:26,234 INFO L225 Difference]: With dead ends: 616 [2021-06-12 21:32:26,237 INFO L226 Difference]: Without dead ends: 586 [2021-06-12 21:32:26,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-12 21:32:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 368. [2021-06-12 21:32:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.915531335149864) internal successors, (1070), 367 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1070 transitions. [2021-06-12 21:32:26,252 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1070 transitions. Word has length 24 [2021-06-12 21:32:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:26,252 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1070 transitions. [2021-06-12 21:32:26,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 21:32:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1070 transitions. [2021-06-12 21:32:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:26,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:26,257 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 21:32:26,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:26,474 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1585830426, now seen corresponding path program 3 times [2021-06-12 21:32:26,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:26,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813412942] [2021-06-12 21:32:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:26,714 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 21:32:26,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813412942] [2021-06-12 21:32:26,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813412942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87807585] [2021-06-12 21:32:26,714 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 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 21:32:26,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:32:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:32:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:26,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-12 21:32:26,849 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 21:32:26,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,861 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 21:32:26,895 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 21:32:26,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,912 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 21:32:26,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:32:26,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,934 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 21:32:26,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-06-12 21:32:26,991 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 21:32:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87807585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:26,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:26,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-06-12 21:32:26,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303924910] [2021-06-12 21:32:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:26,992 INFO L87 Difference]: Start difference. First operand 368 states and 1070 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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 21:32:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:27,432 INFO L93 Difference]: Finished difference Result 717 states and 2081 transitions. [2021-06-12 21:32:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 24 [2021-06-12 21:32:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:27,435 INFO L225 Difference]: With dead ends: 717 [2021-06-12 21:32:27,436 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 21:32:27,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 21:32:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2021-06-12 21:32:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-06-12 21:32:27,444 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-06-12 21:32:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:27,444 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-06-12 21:32:27,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 21:32:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-06-12 21:32:27,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:27,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:27,445 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 21:32:27,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:32:27,657 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 416827498, now seen corresponding path program 4 times [2021-06-12 21:32:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:27,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038765531] [2021-06-12 21:32:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:27,830 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 21:32:27,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038765531] [2021-06-12 21:32:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038765531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677513185] [2021-06-12 21:32:27,831 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 21:32:27,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:32:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:27,955 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 21:32:27,957 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 21:32:27,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:27,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-12 21:32:27,968 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 21:32:27,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:27,979 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 21:32:27,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:27,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:27,986 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 21:32:27,986 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-12 21:32:28,007 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 21:32:28,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677513185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:28,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:32:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415544329] [2021-06-12 21:32:28,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:28,008 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:32:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:28,214 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-06-12 21:32:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:32:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:32:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:28,218 INFO L225 Difference]: With dead ends: 558 [2021-06-12 21:32:28,220 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 21:32:28,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 21:32:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-06-12 21:32:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-06-12 21:32:28,228 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-06-12 21:32:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:28,228 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-06-12 21:32:28,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:32:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-06-12 21:32:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:28,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:28,230 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 21:32:28,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:28,445 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2079136470, now seen corresponding path program 5 times [2021-06-12 21:32:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:28,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066911964] [2021-06-12 21:32:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:28,637 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 21:32:28,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:28,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066911964] [2021-06-12 21:32:28,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066911964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015299465] [2021-06-12 21:32:28,638 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 21:32:28,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:32:28,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:28,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-06-12 21:32:28,789 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 21:32:28,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,804 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 21:32:28,837 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 21:32:28,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,859 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 19 treesize of output 23 [2021-06-12 21:32:28,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:32:28,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,898 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 21:32:28,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:45 [2021-06-12 21:32:28,963 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 21:32:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015299465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:28,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:32:28,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877410213] [2021-06-12 21:32:28,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:28,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:28,965 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 21:32:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:29,297 INFO L93 Difference]: Finished difference Result 681 states and 1985 transitions. [2021-06-12 21:32:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 21:32:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:29,300 INFO L225 Difference]: With dead ends: 681 [2021-06-12 21:32:29,300 INFO L226 Difference]: Without dead ends: 666 [2021-06-12 21:32:29,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-12 21:32:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-06-12 21:32:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-06-12 21:32:29,309 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-06-12 21:32:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:29,309 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-06-12 21:32:29,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 21:32:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-06-12 21:32:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:29,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:29,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:29,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 21:32:29,529 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 430819029, now seen corresponding path program 6 times [2021-06-12 21:32:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:29,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809258856] [2021-06-12 21:32:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:29,566 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 21:32:29,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:29,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809258856] [2021-06-12 21:32:29,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809258856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:29,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906699067] [2021-06-12 21:32:29,567 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 21:32:29,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:32:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:29,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906699067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785001556] [2021-06-12 21:32:29,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:29,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:29,673 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 21:32:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:30,047 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-06-12 21:32:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:32:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-06-12 21:32:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:30,052 INFO L225 Difference]: With dead ends: 1186 [2021-06-12 21:32:30,052 INFO L226 Difference]: Without dead ends: 1186 [2021-06-12 21:32:30,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:32:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-12 21:32:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-06-12 21:32:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-06-12 21:32:30,065 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-06-12 21:32:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:30,065 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-06-12 21:32:30,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 21:32:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-06-12 21:32:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:30,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:30,067 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:30,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:30,281 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 919339717, now seen corresponding path program 7 times [2021-06-12 21:32:30,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:30,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110182441] [2021-06-12 21:32:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:30,318 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 21:32:30,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:30,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110182441] [2021-06-12 21:32:30,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110182441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:30,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997046619] [2021-06-12 21:32:30,318 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 21:32:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997046619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971114953] [2021-06-12 21:32:30,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:30,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:30,426 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:31,203 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-06-12 21:32:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:32:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:31,210 INFO L225 Difference]: With dead ends: 2025 [2021-06-12 21:32:31,210 INFO L226 Difference]: Without dead ends: 2025 [2021-06-12 21:32:31,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:32:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-12 21:32:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-06-12 21:32:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-06-12 21:32:31,228 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-06-12 21:32:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:31,228 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-06-12 21:32:31,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-06-12 21:32:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:31,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:31,229 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:31,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 21:32:31,437 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:31,437 INFO L82 PathProgramCache]: Analyzing trace with hash 725439049, now seen corresponding path program 8 times [2021-06-12 21:32:31,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:31,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208046713] [2021-06-12 21:32:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:31,483 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 21:32:31,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208046713] [2021-06-12 21:32:31,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208046713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748362637] [2021-06-12 21:32:31,484 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 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 21:32:31,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:31,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:31,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748362637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:31,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:31,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:31,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921803830] [2021-06-12 21:32:31,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:31,622 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:32,320 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-06-12 21:32:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:32:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:32,326 INFO L225 Difference]: With dead ends: 1842 [2021-06-12 21:32:32,326 INFO L226 Difference]: Without dead ends: 1842 [2021-06-12 21:32:32,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:32:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-12 21:32:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-06-12 21:32:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-06-12 21:32:32,342 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-06-12 21:32:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:32,342 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-06-12 21:32:32,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-06-12 21:32:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:32,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:32,343 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, 1, 1, 1] [2021-06-12 21:32:32,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 21:32:32,557 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 682299666, now seen corresponding path program 1 times [2021-06-12 21:32:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:32,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878058661] [2021-06-12 21:32:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:32,581 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 21:32:32,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:32,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878058661] [2021-06-12 21:32:32,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878058661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:32,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144146417] [2021-06-12 21:32:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:32:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:32:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:32,650 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 21:32:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144146417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:32,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:32,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:32:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763415236] [2021-06-12 21:32:32,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:32:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:32:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:32:32,651 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:32,749 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-06-12 21:32:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-12 21:32:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:32,753 INFO L225 Difference]: With dead ends: 1215 [2021-06-12 21:32:32,753 INFO L226 Difference]: Without dead ends: 1209 [2021-06-12 21:32:32,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-12 21:32:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-06-12 21:32:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-06-12 21:32:32,792 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-06-12 21:32:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:32,792 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-06-12 21:32:32,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-06-12 21:32:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:32,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:32,794 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:33,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 21:32:33,009 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -542744963, now seen corresponding path program 9 times [2021-06-12 21:32:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:33,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837457286] [2021-06-12 21:32:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837457286] [2021-06-12 21:32:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837457286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332126484] [2021-06-12 21:32:33,042 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:33,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:32:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332126484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:33,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:32:33,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694140583] [2021-06-12 21:32:33,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:33,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:33,150 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 21:32:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:33,313 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-06-12 21:32:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 27 [2021-06-12 21:32:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:33,318 INFO L225 Difference]: With dead ends: 1375 [2021-06-12 21:32:33,318 INFO L226 Difference]: Without dead ends: 1327 [2021-06-12 21:32:33,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:32:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-12 21:32:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-06-12 21:32:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-06-12 21:32:33,338 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-06-12 21:32:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:33,338 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-06-12 21:32:33,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 21:32:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-06-12 21:32:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:33,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:33,340 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, 1, 1, 1] [2021-06-12 21:32:33,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:33,556 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1956507318, now seen corresponding path program 2 times [2021-06-12 21:32:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:33,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077151719] [2021-06-12 21:32:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:33,576 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 21:32:33,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:33,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077151719] [2021-06-12 21:32:33,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077151719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955275529] [2021-06-12 21:32:33,577 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 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 21:32:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:32:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:33,679 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 21:32:33,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955275529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:33,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:32:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232200010] [2021-06-12 21:32:33,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:32:33,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:32:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:32:33,680 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:33,767 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-06-12 21:32:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-12 21:32:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:33,772 INFO L225 Difference]: With dead ends: 1478 [2021-06-12 21:32:33,772 INFO L226 Difference]: Without dead ends: 1478 [2021-06-12 21:32:33,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-12 21:32:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-06-12 21:32:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-06-12 21:32:33,791 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-06-12 21:32:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-06-12 21:32:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-06-12 21:32:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:33,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:33,793 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:34,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 21:32:34,009 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2118816535, now seen corresponding path program 10 times [2021-06-12 21:32:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132473559] [2021-06-12 21:32:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:34,040 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 21:32:34,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132473559] [2021-06-12 21:32:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132473559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301315107] [2021-06-12 21:32:34,041 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 21:32:34,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:34,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:34,133 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 21:32:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301315107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:34,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:34,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377908466] [2021-06-12 21:32:34,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:34,134 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 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 21:32:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:34,437 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-06-12 21:32:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:32:34,437 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 27 [2021-06-12 21:32:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:34,444 INFO L225 Difference]: With dead ends: 2277 [2021-06-12 21:32:34,444 INFO L226 Difference]: Without dead ends: 2277 [2021-06-12 21:32:34,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-12 21:32:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-06-12 21:32:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-06-12 21:32:34,468 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-06-12 21:32:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:34,468 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-06-12 21:32:34,468 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 21:32:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-06-12 21:32:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:34,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:34,470 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:34,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:34,686 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2031092163, now seen corresponding path program 11 times [2021-06-12 21:32:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:34,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485390138] [2021-06-12 21:32:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:34,721 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 21:32:34,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485390138] [2021-06-12 21:32:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485390138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137651545] [2021-06-12 21:32:34,722 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 21:32:34,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:32:34,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:34,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:34,812 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 21:32:34,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137651545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:34,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:34,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204063820] [2021-06-12 21:32:34,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:34,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:34,813 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 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 21:32:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:35,238 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-06-12 21:32:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:32:35,239 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 27 [2021-06-12 21:32:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:35,247 INFO L225 Difference]: With dead ends: 2725 [2021-06-12 21:32:35,247 INFO L226 Difference]: Without dead ends: 2725 [2021-06-12 21:32:35,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:32:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-12 21:32:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-06-12 21:32:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-06-12 21:32:35,273 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-06-12 21:32:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:35,274 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-06-12 21:32:35,274 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 21:32:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-06-12 21:32:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:35,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:35,275 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:35,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 21:32:35,489 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1703761887, now seen corresponding path program 12 times [2021-06-12 21:32:35,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:35,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292469510] [2021-06-12 21:32:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:35,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:35,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292469510] [2021-06-12 21:32:35,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292469510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:35,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593952309] [2021-06-12 21:32:35,525 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 21:32:35,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 21:32:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593952309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:35,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:35,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:32:35,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807295094] [2021-06-12 21:32:35,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:35,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:35,631 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 21:32:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:35,841 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-06-12 21:32:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:32:35,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 27 [2021-06-12 21:32:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:35,847 INFO L225 Difference]: With dead ends: 2457 [2021-06-12 21:32:35,847 INFO L226 Difference]: Without dead ends: 2447 [2021-06-12 21:32:35,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-12 21:32:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-06-12 21:32:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-06-12 21:32:35,876 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-06-12 21:32:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:35,876 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-06-12 21:32:35,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 21:32:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-06-12 21:32:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:35,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:35,878 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:36,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:36,097 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1641907719, now seen corresponding path program 13 times [2021-06-12 21:32:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:36,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208222009] [2021-06-12 21:32:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:36,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208222009] [2021-06-12 21:32:36,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208222009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884510432] [2021-06-12 21:32:36,127 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 21:32:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:36,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:36,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884510432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:36,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:32:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468245301] [2021-06-12 21:32:36,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:36,226 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 21:32:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:36,526 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-06-12 21:32:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:32:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 27 [2021-06-12 21:32:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:36,536 INFO L225 Difference]: With dead ends: 2556 [2021-06-12 21:32:36,536 INFO L226 Difference]: Without dead ends: 2556 [2021-06-12 21:32:36,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:32:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-12 21:32:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-06-12 21:32:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-06-12 21:32:36,567 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-06-12 21:32:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:36,567 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-06-12 21:32:36,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 21:32:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-06-12 21:32:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:36,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:36,570 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:36,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 21:32:36,787 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash 481161223, now seen corresponding path program 14 times [2021-06-12 21:32:36,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:36,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194622211] [2021-06-12 21:32:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:36,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194622211] [2021-06-12 21:32:36,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194622211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110495950] [2021-06-12 21:32:36,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:32:36,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110495950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:36,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:36,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547574424] [2021-06-12 21:32:36,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:36,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:36,903 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 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 21:32:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:37,259 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-06-12 21:32:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:32:37,260 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 27 [2021-06-12 21:32:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:37,264 INFO L225 Difference]: With dead ends: 3074 [2021-06-12 21:32:37,265 INFO L226 Difference]: Without dead ends: 3070 [2021-06-12 21:32:37,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:32:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-12 21:32:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-06-12 21:32:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-06-12 21:32:37,309 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-06-12 21:32:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:37,309 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-06-12 21:32:37,309 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 21:32:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-06-12 21:32:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:37,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:37,312 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:37,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:37,529 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1748600121, now seen corresponding path program 15 times [2021-06-12 21:32:37,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:37,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632413551] [2021-06-12 21:32:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:37,565 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 21:32:37,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:37,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632413551] [2021-06-12 21:32:37,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632413551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906521722] [2021-06-12 21:32:37,566 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 21:32:37,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:32:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:37,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:37,669 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 21:32:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906521722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637753048] [2021-06-12 21:32:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:37,671 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:38,426 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-06-12 21:32:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:32:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:38,437 INFO L225 Difference]: With dead ends: 5541 [2021-06-12 21:32:38,437 INFO L226 Difference]: Without dead ends: 5541 [2021-06-12 21:32:38,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:32:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-06-12 21:32:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-06-12 21:32:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-06-12 21:32:38,497 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-06-12 21:32:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:38,498 INFO L482 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-06-12 21:32:38,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-06-12 21:32:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:38,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:38,500 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:38,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:32:38,717 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1942500789, now seen corresponding path program 16 times [2021-06-12 21:32:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:38,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789840549] [2021-06-12 21:32:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:38,757 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 21:32:38,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789840549] [2021-06-12 21:32:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789840549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911451253] [2021-06-12 21:32:38,758 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 21:32:38,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:38,884 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 21:32:38,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911451253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:38,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:38,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:38,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096201671] [2021-06-12 21:32:38,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:38,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:38,886 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:39,651 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-06-12 21:32:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:32:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:39,661 INFO L225 Difference]: With dead ends: 5525 [2021-06-12 21:32:39,661 INFO L226 Difference]: Without dead ends: 5525 [2021-06-12 21:32:39,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:32:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-12 21:32:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-06-12 21:32:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-06-12 21:32:39,721 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-06-12 21:32:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:39,721 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-06-12 21:32:39,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-06-12 21:32:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:39,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:39,725 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:39,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 21:32:39,942 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1980556741, now seen corresponding path program 17 times [2021-06-12 21:32:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:39,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986027963] [2021-06-12 21:32:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:39,973 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 21:32:39,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986027963] [2021-06-12 21:32:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986027963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410620708] [2021-06-12 21:32:39,973 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 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 21:32:40,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:32:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:40,067 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 21:32:40,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410620708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:40,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:40,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:40,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371576906] [2021-06-12 21:32:40,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:40,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:40,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:40,069 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 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 21:32:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:40,695 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-06-12 21:32:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:32:40,696 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 27 [2021-06-12 21:32:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:40,704 INFO L225 Difference]: With dead ends: 5112 [2021-06-12 21:32:40,704 INFO L226 Difference]: Without dead ends: 5112 [2021-06-12 21:32:40,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:32:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-06-12 21:32:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-06-12 21:32:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-06-12 21:32:40,782 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-06-12 21:32:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:40,782 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-06-12 21:32:40,782 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 21:32:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-06-12 21:32:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:40,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:40,785 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:41,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:32:41,001 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1791338443, now seen corresponding path program 18 times [2021-06-12 21:32:41,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:41,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725207122] [2021-06-12 21:32:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:41,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725207122] [2021-06-12 21:32:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725207122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996174506] [2021-06-12 21:32:41,040 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 21:32:41,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:41,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996174506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:41,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:41,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839803286] [2021-06-12 21:32:41,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:41,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:41,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:41,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:41,128 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 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 21:32:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:41,712 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-06-12 21:32:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:32:41,712 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 27 [2021-06-12 21:32:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:41,720 INFO L225 Difference]: With dead ends: 4837 [2021-06-12 21:32:41,720 INFO L226 Difference]: Without dead ends: 4833 [2021-06-12 21:32:41,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:32:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-06-12 21:32:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-06-12 21:32:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-06-12 21:32:41,761 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-06-12 21:32:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:41,761 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-06-12 21:32:41,761 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 21:32:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-06-12 21:32:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:41,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:41,764 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:41,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 21:32:41,977 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1114107637, now seen corresponding path program 19 times [2021-06-12 21:32:41,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:41,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977117780] [2021-06-12 21:32:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:42,019 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 21:32:42,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977117780] [2021-06-12 21:32:42,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977117780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830851522] [2021-06-12 21:32:42,020 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 21:32:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:42,111 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 21:32:42,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830851522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:42,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:42,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:42,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868404642] [2021-06-12 21:32:42,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:42,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:42,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:42,112 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:42,774 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-06-12 21:32:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:32:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:42,781 INFO L225 Difference]: With dead ends: 4879 [2021-06-12 21:32:42,782 INFO L226 Difference]: Without dead ends: 4879 [2021-06-12 21:32:42,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:32:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-12 21:32:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-06-12 21:32:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-06-12 21:32:42,826 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-06-12 21:32:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:42,826 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-06-12 21:32:42,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-06-12 21:32:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:42,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:42,829 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:43,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:43,046 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 668541833, now seen corresponding path program 20 times [2021-06-12 21:32:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938059121] [2021-06-12 21:32:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:43,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938059121] [2021-06-12 21:32:43,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938059121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802891435] [2021-06-12 21:32:43,075 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 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 21:32:43,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802891435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:43,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:43,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:43,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902197059] [2021-06-12 21:32:43,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:43,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:43,196 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:43,817 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-06-12 21:32:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:32:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:43,824 INFO L225 Difference]: With dead ends: 4586 [2021-06-12 21:32:43,825 INFO L226 Difference]: Without dead ends: 4582 [2021-06-12 21:32:43,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:32:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-06-12 21:32:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-06-12 21:32:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-06-12 21:32:43,863 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-06-12 21:32:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:43,863 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-06-12 21:32:43,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-06-12 21:32:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:43,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:43,866 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, 1, 1, 1] [2021-06-12 21:32:44,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:44,081 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash -393874732, now seen corresponding path program 3 times [2021-06-12 21:32:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:44,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495976629] [2021-06-12 21:32:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:44,107 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 21:32:44,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495976629] [2021-06-12 21:32:44,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495976629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504468324] [2021-06-12 21:32:44,107 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 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 21:32:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:32:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:32:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:44,179 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 21:32:44,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504468324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:44,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:32:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182419798] [2021-06-12 21:32:44,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:32:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:32:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:32:44,181 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:44,267 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-06-12 21:32:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:32:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-12 21:32:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:44,270 INFO L225 Difference]: With dead ends: 1973 [2021-06-12 21:32:44,270 INFO L226 Difference]: Without dead ends: 1973 [2021-06-12 21:32:44,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-12 21:32:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-06-12 21:32:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-06-12 21:32:44,301 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-06-12 21:32:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:44,301 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-06-12 21:32:44,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 21:32:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-06-12 21:32:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:44,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:44,307 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:44,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 21:32:44,521 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1713019731, now seen corresponding path program 21 times [2021-06-12 21:32:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:44,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225149717] [2021-06-12 21:32:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:44,554 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 21:32:44,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:44,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225149717] [2021-06-12 21:32:44,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225149717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381420257] [2021-06-12 21:32:44,554 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 21:32:44,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:32:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:44,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:44,625 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 21:32:44,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381420257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:44,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:32:44,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384260211] [2021-06-12 21:32:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:32:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:32:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:32:44,629 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 21:32:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:44,909 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-06-12 21:32:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:32:44,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-12 21:32:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:44,913 INFO L225 Difference]: With dead ends: 3078 [2021-06-12 21:32:44,913 INFO L226 Difference]: Without dead ends: 3078 [2021-06-12 21:32:44,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:32:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-12 21:32:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-06-12 21:32:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-06-12 21:32:44,941 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-06-12 21:32:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:44,941 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-06-12 21:32:44,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 21:32:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-06-12 21:32:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:44,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:44,944 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:45,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:45,161 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1929419657, now seen corresponding path program 22 times [2021-06-12 21:32:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:45,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859929933] [2021-06-12 21:32:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:45,186 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 21:32:45,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:45,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859929933] [2021-06-12 21:32:45,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859929933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068251410] [2021-06-12 21:32:45,186 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 21:32:45,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:45,254 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 21:32:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068251410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:45,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:32:45,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450512947] [2021-06-12 21:32:45,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:32:45,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:32:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:32:45,255 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 21:32:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:45,493 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-06-12 21:32:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:32:45,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-06-12 21:32:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:45,497 INFO L225 Difference]: With dead ends: 3165 [2021-06-12 21:32:45,498 INFO L226 Difference]: Without dead ends: 3165 [2021-06-12 21:32:45,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-12 21:32:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-06-12 21:32:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-06-12 21:32:45,536 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-06-12 21:32:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:45,536 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-06-12 21:32:45,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 21:32:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-06-12 21:32:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:45,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:45,539 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:45,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:32:45,746 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:45,746 INFO L82 PathProgramCache]: Analyzing trace with hash 815616699, now seen corresponding path program 23 times [2021-06-12 21:32:45,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:45,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314637976] [2021-06-12 21:32:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:45,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:45,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314637976] [2021-06-12 21:32:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314637976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623138611] [2021-06-12 21:32:45,767 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 21:32:45,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623138611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:32:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356169883] [2021-06-12 21:32:45,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:32:45,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:32:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:32:45,834 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 21:32:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:46,030 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-06-12 21:32:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:32:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-06-12 21:32:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:46,034 INFO L225 Difference]: With dead ends: 3029 [2021-06-12 21:32:46,034 INFO L226 Difference]: Without dead ends: 3025 [2021-06-12 21:32:46,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-06-12 21:32:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-06-12 21:32:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-06-12 21:32:46,067 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-06-12 21:32:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:46,067 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-06-12 21:32:46,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 21:32:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-06-12 21:32:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:46,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:46,070 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:46,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:46,285 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1987345865, now seen corresponding path program 24 times [2021-06-12 21:32:46,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:46,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295809961] [2021-06-12 21:32:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:46,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295809961] [2021-06-12 21:32:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295809961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596079522] [2021-06-12 21:32:46,312 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 21:32:46,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596079522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:46,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:32:46,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731172605] [2021-06-12 21:32:46,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:32:46,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:32:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:32:46,383 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 21:32:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:46,615 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-06-12 21:32:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:32:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-12 21:32:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:46,619 INFO L225 Difference]: With dead ends: 3009 [2021-06-12 21:32:46,619 INFO L226 Difference]: Without dead ends: 2993 [2021-06-12 21:32:46,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-06-12 21:32:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-06-12 21:32:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-06-12 21:32:46,645 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-06-12 21:32:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:46,645 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-06-12 21:32:46,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 21:32:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-06-12 21:32:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:46,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:46,661 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:46,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 21:32:46,868 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash 353835191, now seen corresponding path program 25 times [2021-06-12 21:32:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:46,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652026393] [2021-06-12 21:32:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:46,895 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 21:32:46,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652026393] [2021-06-12 21:32:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652026393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588898060] [2021-06-12 21:32:46,895 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 21:32:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:47,004 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 21:32:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588898060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:47,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:47,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617072693] [2021-06-12 21:32:47,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:47,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:47,006 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:47,497 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-06-12 21:32:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:32:47,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:47,507 INFO L225 Difference]: With dead ends: 5256 [2021-06-12 21:32:47,508 INFO L226 Difference]: Without dead ends: 5256 [2021-06-12 21:32:47,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-12 21:32:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-06-12 21:32:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-06-12 21:32:47,544 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-06-12 21:32:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:47,544 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-06-12 21:32:47,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-06-12 21:32:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:47,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:47,547 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:47,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:47,755 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 159934523, now seen corresponding path program 26 times [2021-06-12 21:32:47,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:47,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119123764] [2021-06-12 21:32:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:47,786 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 21:32:47,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:47,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119123764] [2021-06-12 21:32:47,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119123764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579747165] [2021-06-12 21:32:47,786 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 21:32:47,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:47,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:47,881 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 21:32:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579747165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:47,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295377685] [2021-06-12 21:32:47,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:47,882 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:48,344 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-06-12 21:32:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:32:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-06-12 21:32:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:48,351 INFO L225 Difference]: With dead ends: 5169 [2021-06-12 21:32:48,351 INFO L226 Difference]: Without dead ends: 5169 [2021-06-12 21:32:48,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-06-12 21:32:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-06-12 21:32:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-12 21:32:48,391 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-12 21:32:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:48,391 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-12 21:32:48,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 21:32:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-12 21:32:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:48,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:48,394 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:48,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 21:32:48,609 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash -211975243, now seen corresponding path program 27 times [2021-06-12 21:32:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:48,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834577544] [2021-06-12 21:32:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,644 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 21:32:48,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834577544] [2021-06-12 21:32:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834577544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970268174] [2021-06-12 21:32:48,644 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 21:32:48,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:32:48,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:48,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:48,756 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 21:32:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970268174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:48,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328806614] [2021-06-12 21:32:48,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:48,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:48,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:48,757 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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 21:32:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:49,183 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-06-12 21:32:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:32:49,184 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 27 [2021-06-12 21:32:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:49,189 INFO L225 Difference]: With dead ends: 4755 [2021-06-12 21:32:49,189 INFO L226 Difference]: Without dead ends: 4755 [2021-06-12 21:32:49,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:32:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-06-12 21:32:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-06-12 21:32:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-12 21:32:49,224 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-12 21:32:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:49,224 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-12 21:32:49,224 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 21:32:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-12 21:32:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:49,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:49,227 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:49,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:49,428 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash -401193541, now seen corresponding path program 28 times [2021-06-12 21:32:49,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:49,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156961600] [2021-06-12 21:32:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:49,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156961600] [2021-06-12 21:32:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156961600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689241147] [2021-06-12 21:32:49,462 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 21:32:49,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:49,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689241147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:49,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926380282] [2021-06-12 21:32:49,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:49,543 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 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 21:32:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:49,924 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-06-12 21:32:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:32:49,925 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 27 [2021-06-12 21:32:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:49,930 INFO L225 Difference]: With dead ends: 4606 [2021-06-12 21:32:49,930 INFO L226 Difference]: Without dead ends: 4602 [2021-06-12 21:32:49,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:32:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-06-12 21:32:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-06-12 21:32:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-12 21:32:49,971 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-12 21:32:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:49,972 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-12 21:32:49,972 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 21:32:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-12 21:32:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:49,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:49,975 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:50,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:50,191 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash 988327675, now seen corresponding path program 29 times [2021-06-12 21:32:50,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:50,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558456410] [2021-06-12 21:32:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:50,219 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 21:32:50,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:50,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558456410] [2021-06-12 21:32:50,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558456410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:50,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245713818] [2021-06-12 21:32:50,220 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 21:32:50,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:50,343 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 21:32:50,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245713818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:50,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:50,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:50,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259545368] [2021-06-12 21:32:50,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:50,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:50,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:50,344 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:50,788 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-06-12 21:32:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:32:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:50,793 INFO L225 Difference]: With dead ends: 4605 [2021-06-12 21:32:50,793 INFO L226 Difference]: Without dead ends: 4605 [2021-06-12 21:32:50,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:32:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-12 21:32:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-06-12 21:32:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-12 21:32:50,831 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-12 21:32:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:50,831 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-12 21:32:50,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-12 21:32:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:50,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:50,834 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:51,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-12 21:32:51,048 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1523990151, now seen corresponding path program 30 times [2021-06-12 21:32:51,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:51,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052886200] [2021-06-12 21:32:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052886200] [2021-06-12 21:32:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052886200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070056600] [2021-06-12 21:32:51,097 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 21:32:51,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:51,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:51,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070056600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:51,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:51,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504931166] [2021-06-12 21:32:51,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:51,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:51,211 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:51,581 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-06-12 21:32:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:32:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:51,587 INFO L225 Difference]: With dead ends: 4532 [2021-06-12 21:32:51,587 INFO L226 Difference]: Without dead ends: 4528 [2021-06-12 21:32:51,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:32:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-06-12 21:32:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-06-12 21:32:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-12 21:32:51,634 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-12 21:32:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:51,635 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-12 21:32:51,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-12 21:32:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:51,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:51,638 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:51,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:51,849 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -480721671, now seen corresponding path program 31 times [2021-06-12 21:32:51,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:51,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59223960] [2021-06-12 21:32:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:51,880 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 21:32:51,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:51,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59223960] [2021-06-12 21:32:51,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59223960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103872187] [2021-06-12 21:32:51,881 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 21:32:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:51,969 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 21:32:51,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103872187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:51,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:51,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524870491] [2021-06-12 21:32:51,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:51,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:51,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:51,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:51,970 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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 21:32:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:52,336 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-06-12 21:32:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:32:52,337 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 27 [2021-06-12 21:32:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:52,342 INFO L225 Difference]: With dead ends: 4168 [2021-06-12 21:32:52,342 INFO L226 Difference]: Without dead ends: 4168 [2021-06-12 21:32:52,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:32:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-12 21:32:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-06-12 21:32:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-06-12 21:32:52,384 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-06-12 21:32:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:52,384 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-06-12 21:32:52,384 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 21:32:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-06-12 21:32:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:52,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:52,387 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 21:32:52,605 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -669939969, now seen corresponding path program 32 times [2021-06-12 21:32:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983379549] [2021-06-12 21:32:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:52,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:52,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983379549] [2021-06-12 21:32:52,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983379549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547401820] [2021-06-12 21:32:52,634 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:52,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:52,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:52,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547401820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:52,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909516856] [2021-06-12 21:32:52,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:52,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:52,710 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 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 21:32:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:53,027 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-06-12 21:32:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:32:53,027 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 27 [2021-06-12 21:32:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:53,032 INFO L225 Difference]: With dead ends: 3963 [2021-06-12 21:32:53,032 INFO L226 Difference]: Without dead ends: 3959 [2021-06-12 21:32:53,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:32:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-12 21:32:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-06-12 21:32:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-06-12 21:32:53,062 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-06-12 21:32:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:53,062 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-06-12 21:32:53,062 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 21:32:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-06-12 21:32:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:53,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:53,065 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:53,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:53,266 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash -26557709, now seen corresponding path program 33 times [2021-06-12 21:32:53,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:53,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26226121] [2021-06-12 21:32:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:53,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26226121] [2021-06-12 21:32:53,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26226121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581734095] [2021-06-12 21:32:53,297 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 21:32:53,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:32:53,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:53,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581734095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:53,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:32:53,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191205662] [2021-06-12 21:32:53,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:32:53,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:32:53,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:32:53,373 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 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 21:32:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:53,595 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-06-12 21:32:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:32:53,595 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 27 [2021-06-12 21:32:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:53,600 INFO L225 Difference]: With dead ends: 3687 [2021-06-12 21:32:53,600 INFO L226 Difference]: Without dead ends: 3671 [2021-06-12 21:32:53,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-12 21:32:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-06-12 21:32:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-06-12 21:32:53,632 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-06-12 21:32:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:53,632 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-06-12 21:32:53,632 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 21:32:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-06-12 21:32:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:53,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:53,635 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:53,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 21:32:53,837 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash 285798263, now seen corresponding path program 34 times [2021-06-12 21:32:53,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:53,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956447209] [2021-06-12 21:32:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:53,879 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 21:32:53,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:53,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956447209] [2021-06-12 21:32:53,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956447209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655075814] [2021-06-12 21:32:53,880 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 21:32:53,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:53,972 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 21:32:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655075814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:53,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493499416] [2021-06-12 21:32:53,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:53,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:53,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:53,973 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:54,281 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-06-12 21:32:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:32:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:54,286 INFO L225 Difference]: With dead ends: 3798 [2021-06-12 21:32:54,286 INFO L226 Difference]: Without dead ends: 3798 [2021-06-12 21:32:54,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:32:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-12 21:32:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-06-12 21:32:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-06-12 21:32:54,322 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-06-12 21:32:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:54,322 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-06-12 21:32:54,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-06-12 21:32:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:54,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:54,326 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 21:32:54,541 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2068447733, now seen corresponding path program 35 times [2021-06-12 21:32:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:54,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446982192] [2021-06-12 21:32:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:54,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446982192] [2021-06-12 21:32:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446982192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180946300] [2021-06-12 21:32:54,571 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 21:32:54,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:54,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180946300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:54,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:54,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:32:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747328036] [2021-06-12 21:32:54,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:54,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:54,660 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:54,956 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-06-12 21:32:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:32:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-06-12 21:32:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:54,965 INFO L225 Difference]: With dead ends: 3765 [2021-06-12 21:32:54,965 INFO L226 Difference]: Without dead ends: 3761 [2021-06-12 21:32:54,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-12 21:32:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-06-12 21:32:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-06-12 21:32:55,003 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-06-12 21:32:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:55,003 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-06-12 21:32:55,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 21:32:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-06-12 21:32:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:32:55,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:55,007 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:55,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:55,207 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476281, now seen corresponding path program 36 times [2021-06-12 21:32:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:55,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380060850] [2021-06-12 21:32:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:55,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380060850] [2021-06-12 21:32:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380060850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132909301] [2021-06-12 21:32:55,237 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 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 21:32:55,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:32:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132909301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890320460] [2021-06-12 21:32:55,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:32:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:32:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:32:55,322 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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 21:32:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:55,488 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-06-12 21:32:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:32:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-06-12 21:32:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:55,493 INFO L225 Difference]: With dead ends: 3553 [2021-06-12 21:32:55,493 INFO L226 Difference]: Without dead ends: 3537 [2021-06-12 21:32:55,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-12 21:32:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-06-12 21:32:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-06-12 21:32:55,541 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-06-12 21:32:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:55,541 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-06-12 21:32:55,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 21:32:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-06-12 21:32:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:32:55,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:55,545 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:55,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 21:32:55,761 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:55,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:55,761 INFO L82 PathProgramCache]: Analyzing trace with hash -469751287, now seen corresponding path program 4 times [2021-06-12 21:32:55,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:55,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764464170] [2021-06-12 21:32:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:56,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764464170] [2021-06-12 21:32:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764464170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314246050] [2021-06-12 21:32:56,081 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 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 21:32:56,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:56,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:56,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,304 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 21:32:56,315 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 21:32:56,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,323 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 21:32:56,325 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 21:32:56,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,336 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 21:32:56,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:56,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,353 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 21:32:56,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:32:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:56,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314246050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:56,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:32:56,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757342347] [2021-06-12 21:32:56,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:32:56,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:56,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:32:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:32:56,376 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:57,197 INFO L93 Difference]: Finished difference Result 3240 states and 10404 transitions. [2021-06-12 21:32:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:32:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:32:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:57,202 INFO L225 Difference]: With dead ends: 3240 [2021-06-12 21:32:57,203 INFO L226 Difference]: Without dead ends: 3225 [2021-06-12 21:32:57,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:32:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-12 21:32:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2459. [2021-06-12 21:32:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-06-12 21:32:57,237 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-06-12 21:32:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:57,237 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-06-12 21:32:57,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-06-12 21:32:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:32:57,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:57,241 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:57,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:57,449 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1937124355, now seen corresponding path program 5 times [2021-06-12 21:32:57,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:57,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575620156] [2021-06-12 21:32:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575620156] [2021-06-12 21:32:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575620156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474631470] [2021-06-12 21:32:57,723 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 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 21:32:57,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:32:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:32:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:58,000 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 21:32:58,002 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 21:32:58,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:58,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:58,010 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 21:32:58,012 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 21:32:58,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:58,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:58,023 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 21:32:58,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:58,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:58,033 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 21:32:58,033 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:32:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474631470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:58,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:58,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:32:58,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539987615] [2021-06-12 21:32:58,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:58,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:58,050 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:59,400 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-06-12 21:32:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:32:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:32:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:59,405 INFO L225 Difference]: With dead ends: 3258 [2021-06-12 21:32:59,405 INFO L226 Difference]: Without dead ends: 3243 [2021-06-12 21:32:59,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1239.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:32:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-06-12 21:32:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-06-12 21:32:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-06-12 21:32:59,436 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-06-12 21:32:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:59,436 INFO L482 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-06-12 21:32:59,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-06-12 21:32:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:32:59,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:59,439 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:32:59,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:59,640 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1694795916, now seen corresponding path program 37 times [2021-06-12 21:32:59,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:59,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704619339] [2021-06-12 21:32:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:00,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:00,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704619339] [2021-06-12 21:33:00,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704619339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:00,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273098052] [2021-06-12 21:33:00,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:00,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:33:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:00,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:00,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:00,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:00,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:00,306 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 21:33:00,309 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 21:33:00,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:00,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:00,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:00,319 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 21:33:00,322 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 21:33:00,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:00,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:00,333 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 21:33:00,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:00,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:00,343 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 21:33:00,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273098052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-12 21:33:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794707746] [2021-06-12 21:33:00,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:00,361 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:04,483 INFO L93 Difference]: Finished difference Result 3579 states and 11315 transitions. [2021-06-12 21:33:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 21:33:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:04,488 INFO L225 Difference]: With dead ends: 3579 [2021-06-12 21:33:04,488 INFO L226 Difference]: Without dead ends: 3553 [2021-06-12 21:33:04,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 3773.0ms TimeCoverageRelationStatistics Valid=836, Invalid=5644, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:33:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-06-12 21:33:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2550. [2021-06-12 21:33:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-06-12 21:33:04,520 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-06-12 21:33:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:04,521 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-06-12 21:33:04,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-06-12 21:33:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:04,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:04,523 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:04,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:04,737 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1505897713, now seen corresponding path program 6 times [2021-06-12 21:33:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:04,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958079497] [2021-06-12 21:33:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:05,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:05,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958079497] [2021-06-12 21:33:05,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958079497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:05,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463578895] [2021-06-12 21:33:05,031 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 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 21:33:05,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:33:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:33:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:05,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:05,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,201 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:33:05,221 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 21:33:05,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:05,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,238 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:33:05,256 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 21:33:05,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,286 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 21:33:05,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:33:05,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:05,379 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 21:33:05,379 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:33:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:05,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463578895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:05,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:05,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:33:05,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59273856] [2021-06-12 21:33:05,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:33:05,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:33:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:05,445 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:07,641 INFO L93 Difference]: Finished difference Result 4146 states and 13081 transitions. [2021-06-12 21:33:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:33:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:07,647 INFO L225 Difference]: With dead ends: 4146 [2021-06-12 21:33:07,647 INFO L226 Difference]: Without dead ends: 4121 [2021-06-12 21:33:07,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1813.5ms TimeCoverageRelationStatistics Valid=431, Invalid=2875, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:33:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-12 21:33:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 2618. [2021-06-12 21:33:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-06-12 21:33:07,689 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-06-12 21:33:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:07,689 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-06-12 21:33:07,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-06-12 21:33:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:07,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:07,692 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:07,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:07,893 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash 475821444, now seen corresponding path program 38 times [2021-06-12 21:33:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:07,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243942760] [2021-06-12 21:33:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:08,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:08,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243942760] [2021-06-12 21:33:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243942760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:08,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430899727] [2021-06-12 21:33:08,367 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 21:33:08,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:08,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:33:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:08,581 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 21:33:08,586 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 21:33:08,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:08,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:08,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:08,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:08,595 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 21:33:08,600 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 21:33:08,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:08,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:08,611 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 21:33:08,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:08,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:08,622 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 21:33:08,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:08,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430899727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:08,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:08,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:33:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656418953] [2021-06-12 21:33:08,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:08,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:08,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:08,641 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:09,731 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 21:33:10,296 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 21:33:10,523 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-12 21:33:11,387 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 21:33:11,913 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-12 21:33:12,418 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-12 21:33:13,443 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-12 21:33:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:14,756 INFO L93 Difference]: Finished difference Result 4273 states and 13434 transitions. [2021-06-12 21:33:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 21:33:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:14,761 INFO L225 Difference]: With dead ends: 4273 [2021-06-12 21:33:14,762 INFO L226 Difference]: Without dead ends: 4251 [2021-06-12 21:33:14,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 5514.9ms TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 21:33:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-12 21:33:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 2648. [2021-06-12 21:33:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-06-12 21:33:14,799 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-06-12 21:33:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:14,799 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-06-12 21:33:14,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-06-12 21:33:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:14,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:14,802 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:15,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 21:33:15,003 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash 964342132, now seen corresponding path program 39 times [2021-06-12 21:33:15,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:15,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622624312] [2021-06-12 21:33:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:15,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:15,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622624312] [2021-06-12 21:33:15,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622624312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:15,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247464365] [2021-06-12 21:33:15,348 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 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 21:33:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:33:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:33:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:15,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,618 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 21:33:15,620 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 21:33:15,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,631 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 21:33:15,633 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 21:33:15,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:15,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:15,647 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 21:33:15,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:15,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:15,659 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 21:33:15,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247464365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:15,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:15,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:33:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299267571] [2021-06-12 21:33:15,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:15,685 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:17,654 INFO L93 Difference]: Finished difference Result 4578 states and 14253 transitions. [2021-06-12 21:33:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:33:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:17,661 INFO L225 Difference]: With dead ends: 4578 [2021-06-12 21:33:17,661 INFO L226 Difference]: Without dead ends: 4548 [2021-06-12 21:33:17,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2926, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:33:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-12 21:33:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2789. [2021-06-12 21:33:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-06-12 21:33:17,710 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-06-12 21:33:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:17,710 INFO L482 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-06-12 21:33:17,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-06-12 21:33:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:17,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:17,714 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:17,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 21:33:17,914 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 804456365, now seen corresponding path program 7 times [2021-06-12 21:33:17,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:17,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813351071] [2021-06-12 21:33:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:18,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:18,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813351071] [2021-06-12 21:33:18,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813351071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:18,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024008232] [2021-06-12 21:33:18,212 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 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 21:33:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:33:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:18,437 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 21:33:18,439 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 21:33:18,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:18,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:18,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:18,447 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 21:33:18,449 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 21:33:18,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:18,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:18,460 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 21:33:18,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:18,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:18,470 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 21:33:18,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:33:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:18,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024008232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:18,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:18,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:33:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112888023] [2021-06-12 21:33:18,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:33:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:33:18,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:18,497 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:19,555 INFO L93 Difference]: Finished difference Result 3530 states and 11354 transitions. [2021-06-12 21:33:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:33:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:19,560 INFO L225 Difference]: With dead ends: 3530 [2021-06-12 21:33:19,560 INFO L226 Difference]: Without dead ends: 3515 [2021-06-12 21:33:19,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:33:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-12 21:33:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2803. [2021-06-12 21:33:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-06-12 21:33:19,596 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-06-12 21:33:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:19,596 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-06-12 21:33:19,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-06-12 21:33:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:19,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:19,599 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:19,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 21:33:19,800 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -662916703, now seen corresponding path program 8 times [2021-06-12 21:33:19,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:19,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125812701] [2021-06-12 21:33:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125812701] [2021-06-12 21:33:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125812701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294071754] [2021-06-12 21:33:20,074 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 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 21:33:20,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:20,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:33:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:20,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,255 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 49 treesize of output 49 [2021-06-12 21:33:20,285 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 21:33:20,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:20,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,302 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 39 treesize of output 39 [2021-06-12 21:33:20,334 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 21:33:20,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,366 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 29 treesize of output 49 [2021-06-12 21:33:20,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:33:20,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:20,443 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 21:33:20,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-12 21:33:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:20,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294071754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:20,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:20,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:33:20,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831742295] [2021-06-12 21:33:20,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:33:20,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:33:20,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:20,503 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:22,562 INFO L93 Difference]: Finished difference Result 4025 states and 12918 transitions. [2021-06-12 21:33:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:33:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:22,568 INFO L225 Difference]: With dead ends: 4025 [2021-06-12 21:33:22,568 INFO L226 Difference]: Without dead ends: 4000 [2021-06-12 21:33:22,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1544.4ms TimeCoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:33:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-06-12 21:33:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2795. [2021-06-12 21:33:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-06-12 21:33:22,608 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-06-12 21:33:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:22,608 INFO L482 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-06-12 21:33:22,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-06-12 21:33:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:22,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:22,611 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:22,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 21:33:22,812 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -281439163, now seen corresponding path program 9 times [2021-06-12 21:33:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:22,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7628997] [2021-06-12 21:33:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7628997] [2021-06-12 21:33:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7628997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010120689] [2021-06-12 21:33:23,083 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 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 21:33:23,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:33:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:33:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:23,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:23,406 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 21:33:23,407 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 21:33:23,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:23,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:23,417 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 21:33:23,419 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 21:33:23,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:23,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:23,431 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 21:33:23,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:23,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:23,442 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 21:33:23,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-12 21:33:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010120689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:33:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213230959] [2021-06-12 21:33:23,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:33:23,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:33:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:23,458 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:24,154 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 21:33:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:26,185 INFO L93 Difference]: Finished difference Result 3604 states and 11567 transitions. [2021-06-12 21:33:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:33:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:26,191 INFO L225 Difference]: With dead ends: 3604 [2021-06-12 21:33:26,191 INFO L226 Difference]: Without dead ends: 3589 [2021-06-12 21:33:26,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1487.3ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:33:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-12 21:33:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2807. [2021-06-12 21:33:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-06-12 21:33:26,229 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-06-12 21:33:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:26,229 INFO L482 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-06-12 21:33:26,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-06-12 21:33:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:26,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:26,233 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:26,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:26,433 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1858531407, now seen corresponding path program 10 times [2021-06-12 21:33:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:26,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574127788] [2021-06-12 21:33:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:26,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:26,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574127788] [2021-06-12 21:33:26,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574127788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:26,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462197150] [2021-06-12 21:33:26,762 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 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 21:33:26,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:33:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:26,956 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 64 treesize of output 52 [2021-06-12 21:33:26,958 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 21:33:26,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:26,982 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 52 treesize of output 40 [2021-06-12 21:33:26,988 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 21:33:26,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:27,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:27,000 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 40 treesize of output 28 [2021-06-12 21:33:27,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:27,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:27,012 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 21:33:27,013 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-12 21:33:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462197150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 21:33:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128285624] [2021-06-12 21:33:27,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:33:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:33:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:33:27,043 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 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 21:33:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:27,892 INFO L93 Difference]: Finished difference Result 3655 states and 11758 transitions. [2021-06-12 21:33:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:33:27,892 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 30 [2021-06-12 21:33:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:27,897 INFO L225 Difference]: With dead ends: 3655 [2021-06-12 21:33:27,897 INFO L226 Difference]: Without dead ends: 3636 [2021-06-12 21:33:27,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 780.6ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-12 21:33:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2851. [2021-06-12 21:33:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-12 21:33:27,936 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-12 21:33:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:27,936 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-12 21:33:27,936 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 21:33:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-12 21:33:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:27,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:27,939 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:28,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:28,153 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 123759631, now seen corresponding path program 11 times [2021-06-12 21:33:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067060301] [2021-06-12 21:33:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:28,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067060301] [2021-06-12 21:33:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067060301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730377358] [2021-06-12 21:33:28,389 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 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 21:33:28,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:33:28,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:33:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:28,715 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-12 21:33:28,716 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 202 [2021-06-12 21:33:28,733 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 21:33:28,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:28,769 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-12 21:33:28,769 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 140 [2021-06-12 21:33:28,812 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 21:33:28,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:28,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:28,844 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 103 treesize of output 91 [2021-06-12 21:33:28,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:28,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:28,927 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 21:33:28,927 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:245, output treesize:19 [2021-06-12 21:33:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:28,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730377358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:28,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:28,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 21:33:28,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427330676] [2021-06-12 21:33:28,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:28,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:28,974 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:44,444 INFO L93 Difference]: Finished difference Result 4431 states and 14103 transitions. [2021-06-12 21:33:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:33:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:44,451 INFO L225 Difference]: With dead ends: 4431 [2021-06-12 21:33:44,451 INFO L226 Difference]: Without dead ends: 4401 [2021-06-12 21:33:44,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 9931.0ms TimeCoverageRelationStatistics Valid=479, Invalid=2707, Unknown=6, NotChecked=0, Total=3192 [2021-06-12 21:33:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-12 21:33:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2851. [2021-06-12 21:33:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-12 21:33:44,500 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-12 21:33:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:44,500 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-12 21:33:44,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-12 21:33:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:44,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:44,504 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:44,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 21:33:44,720 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1795725574, now seen corresponding path program 40 times [2021-06-12 21:33:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:44,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905041655] [2021-06-12 21:33:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:45,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905041655] [2021-06-12 21:33:45,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905041655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243899402] [2021-06-12 21:33:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:45,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:33:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:45,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:45,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:45,254 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 21:33:45,256 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 21:33:45,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:45,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:45,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:45,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:45,266 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 21:33:45,267 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 21:33:45,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,278 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 21:33:45,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,288 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 21:33:45,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:45,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243899402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:45,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:45,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:33:45,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397714683] [2021-06-12 21:33:45,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:45,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:45,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:45,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:45,310 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:48,117 INFO L93 Difference]: Finished difference Result 5434 states and 16862 transitions. [2021-06-12 21:33:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:33:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:48,124 INFO L225 Difference]: With dead ends: 5434 [2021-06-12 21:33:48,124 INFO L226 Difference]: Without dead ends: 5404 [2021-06-12 21:33:48,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2378.1ms TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:33:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-06-12 21:33:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 2923. [2021-06-12 21:33:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2902121834360027) internal successors, (9614), 2922 states have internal predecessors, (9614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9614 transitions. [2021-06-12 21:33:48,190 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9614 transitions. Word has length 30 [2021-06-12 21:33:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:48,190 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9614 transitions. [2021-06-12 21:33:48,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9614 transitions. [2021-06-12 21:33:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:48,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:48,193 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:48,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 21:33:48,394 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1512353848, now seen corresponding path program 41 times [2021-06-12 21:33:48,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:48,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938578454] [2021-06-12 21:33:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:48,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:48,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938578454] [2021-06-12 21:33:48,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938578454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:48,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034378644] [2021-06-12 21:33:48,749 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 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 21:33:48,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:33:48,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:48,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:33:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:48,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:48,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:48,994 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 21:33:48,996 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 21:33:49,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:49,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:49,007 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 21:33:49,009 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 21:33:49,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:49,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:49,021 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 21:33:49,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:49,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:49,031 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 21:33:49,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034378644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:49,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:49,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:33:49,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202518573] [2021-06-12 21:33:49,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:49,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:49,052 INFO L87 Difference]: Start difference. First operand 2923 states and 9614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:51,740 INFO L93 Difference]: Finished difference Result 5109 states and 16139 transitions. [2021-06-12 21:33:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:33:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:51,748 INFO L225 Difference]: With dead ends: 5109 [2021-06-12 21:33:51,748 INFO L226 Difference]: Without dead ends: 5079 [2021-06-12 21:33:51,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2376.7ms TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:33:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2021-06-12 21:33:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 2927. [2021-06-12 21:33:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 3.2911825017088177) internal successors, (9630), 2926 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 9630 transitions. [2021-06-12 21:33:51,800 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 9630 transitions. Word has length 30 [2021-06-12 21:33:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:51,800 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 9630 transitions. [2021-06-12 21:33:51,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 9630 transitions. [2021-06-12 21:33:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:51,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:51,803 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:52,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 21:33:52,004 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:52,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1009505612, now seen corresponding path program 42 times [2021-06-12 21:33:52,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:52,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53294197] [2021-06-12 21:33:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:52,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53294197] [2021-06-12 21:33:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53294197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565555875] [2021-06-12 21:33:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:33:52,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:33:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:33:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,584 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:33:52,585 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 207 treesize of output 193 [2021-06-12 21:33:52,661 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 21:33:52,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,702 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:33:52,703 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 195 treesize of output 175 [2021-06-12 21:33:52,828 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 21:33:52,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:52,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:52,883 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 171 treesize of output 163 [2021-06-12 21:33:53,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:53,605 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2021-06-12 21:33:53,606 INFO L628 ElimStorePlain]: treesize reduction 580, result has 71.1 percent of original size [2021-06-12 21:33:54,064 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 21:33:54,064 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:210, output treesize:34 [2021-06-12 21:33:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:54,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565555875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:54,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:54,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-12 21:33:54,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394230334] [2021-06-12 21:33:54,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:54,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:54,126 INFO L87 Difference]: Start difference. First operand 2927 states and 9630 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:54,515 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-12 21:33:56,103 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-12 21:33:56,963 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-12 21:33:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:58,470 INFO L93 Difference]: Finished difference Result 5927 states and 18549 transitions. [2021-06-12 21:33:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 21:33:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:33:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:58,479 INFO L225 Difference]: With dead ends: 5927 [2021-06-12 21:33:58,479 INFO L226 Difference]: Without dead ends: 5901 [2021-06-12 21:33:58,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 3699.6ms TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:33:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-12 21:33:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 2939. [2021-06-12 21:33:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 3.2950987066031314) internal successors, (9681), 2938 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 9681 transitions. [2021-06-12 21:33:58,535 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 9681 transitions. Word has length 30 [2021-06-12 21:33:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:58,535 INFO L482 AbstractCegarLoop]: Abstraction has 2939 states and 9681 transitions. [2021-06-12 21:33:58,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 9681 transitions. [2021-06-12 21:33:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:58,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:58,539 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:33:58,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 21:33:58,740 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2054481296, now seen corresponding path program 43 times [2021-06-12 21:33:58,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:58,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269922976] [2021-06-12 21:33:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:59,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:59,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269922976] [2021-06-12 21:33:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269922976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:59,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386903938] [2021-06-12 21:33:59,216 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 21:33:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:33:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:59,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:59,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:59,461 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 21:33:59,463 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 21:33:59,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:59,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 21:33:59,474 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 21:33:59,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:59,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:59,487 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 21:33:59,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:59,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:59,497 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 21:33:59,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:33:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:59,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386903938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:59,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:59,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-12 21:33:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065267329] [2021-06-12 21:33:59,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:59,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:59,518 INFO L87 Difference]: Start difference. First operand 2939 states and 9681 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:00,592 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-12 21:34:01,619 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-12 21:34:01,876 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 21:34:02,229 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-12 21:34:02,362 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 21:34:02,852 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-12 21:34:03,132 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 21:34:03,557 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 21:34:04,075 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-06-12 21:34:04,848 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-12 21:34:05,129 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-12 21:34:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:06,397 INFO L93 Difference]: Finished difference Result 4187 states and 13280 transitions. [2021-06-12 21:34:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 21:34:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:34:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:06,403 INFO L225 Difference]: With dead ends: 4187 [2021-06-12 21:34:06,403 INFO L226 Difference]: Without dead ends: 4161 [2021-06-12 21:34:06,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 6246.9ms TimeCoverageRelationStatistics Valid=1045, Invalid=7327, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 21:34:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-12 21:34:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 2933. [2021-06-12 21:34:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.2946793997271486) internal successors, (9660), 2932 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 9660 transitions. [2021-06-12 21:34:06,444 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 9660 transitions. Word has length 30 [2021-06-12 21:34:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:06,444 INFO L482 AbstractCegarLoop]: Abstraction has 2933 states and 9660 transitions. [2021-06-12 21:34:06,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 9660 transitions. [2021-06-12 21:34:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:06,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:06,447 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:06,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:06,660 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -846736199, now seen corresponding path program 12 times [2021-06-12 21:34:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:06,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331579769] [2021-06-12 21:34:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:06,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331579769] [2021-06-12 21:34:06,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331579769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042200228] [2021-06-12 21:34:06,996 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 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 21:34:07,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:34:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:07,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:34:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:07,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,227 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 21:34:07,276 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 21:34:07,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,299 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 21:34:07,334 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 21:34:07,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,373 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 21:34:07,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:34:07,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,472 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 21:34:07,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:42 [2021-06-12 21:34:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:07,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042200228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:07,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:07,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 21:34:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059247437] [2021-06-12 21:34:07,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:07,574 INFO L87 Difference]: Start difference. First operand 2933 states and 9660 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:09,114 INFO L93 Difference]: Finished difference Result 3927 states and 12626 transitions. [2021-06-12 21:34:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:34:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:34:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:09,120 INFO L225 Difference]: With dead ends: 3927 [2021-06-12 21:34:09,120 INFO L226 Difference]: Without dead ends: 3906 [2021-06-12 21:34:09,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:34:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-06-12 21:34:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 2956. [2021-06-12 21:34:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.299830795262267) internal successors, (9751), 2955 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9751 transitions. [2021-06-12 21:34:09,158 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9751 transitions. Word has length 30 [2021-06-12 21:34:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:09,158 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9751 transitions. [2021-06-12 21:34:09,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9751 transitions. [2021-06-12 21:34:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:09,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:09,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:09,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:09,374 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash -930058093, now seen corresponding path program 13 times [2021-06-12 21:34:09,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:09,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271272520] [2021-06-12 21:34:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:09,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:09,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271272520] [2021-06-12 21:34:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271272520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:09,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766582487] [2021-06-12 21:34:09,655 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 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 21:34:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:34:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,873 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 21:34:09,890 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 21:34:09,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,907 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 21:34:09,925 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 21:34:09,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,955 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 21:34:09,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:34:10,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:10,022 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 21:34:10,022 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-06-12 21:34:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:10,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766582487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:10,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:10,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 21:34:10,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208241718] [2021-06-12 21:34:10,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:34:10,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:34:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:34:10,090 INFO L87 Difference]: Start difference. First operand 2956 states and 9751 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:34:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:10,912 INFO L93 Difference]: Finished difference Result 4273 states and 13760 transitions. [2021-06-12 21:34:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:34:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-06-12 21:34:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:10,930 INFO L225 Difference]: With dead ends: 4273 [2021-06-12 21:34:10,930 INFO L226 Difference]: Without dead ends: 4248 [2021-06-12 21:34:10,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:34:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2021-06-12 21:34:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 2950. [2021-06-12 21:34:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-12 21:34:10,971 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-12 21:34:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:10,971 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-12 21:34:10,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:34:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-12 21:34:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:10,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:10,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:11,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:11,189 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash -568960327, now seen corresponding path program 14 times [2021-06-12 21:34:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:11,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86728675] [2021-06-12 21:34:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:11,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86728675] [2021-06-12 21:34:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86728675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037563686] [2021-06-12 21:34:11,489 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 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 21:34:11,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:11,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:34:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:11,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,669 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 21:34:11,689 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 21:34:11,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:11,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,706 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 21:34:11,724 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 21:34:11,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,755 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 21:34:11,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:34:11,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,828 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 21:34:11,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:92 [2021-06-12 21:34:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:11,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037563686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:11,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:11,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:34:11,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2725613] [2021-06-12 21:34:11,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:34:11,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:34:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:34:11,897 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 21:34:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:12,603 INFO L93 Difference]: Finished difference Result 3921 states and 12756 transitions. [2021-06-12 21:34:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:34:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 21:34:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:12,609 INFO L225 Difference]: With dead ends: 3921 [2021-06-12 21:34:12,609 INFO L226 Difference]: Without dead ends: 3896 [2021-06-12 21:34:12,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 653.6ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:34:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-12 21:34:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2950. [2021-06-12 21:34:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-12 21:34:12,650 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-12 21:34:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:12,650 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-12 21:34:12,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 21:34:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-12 21:34:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:12,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:12,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:12,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:12,854 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1088124239, now seen corresponding path program 15 times [2021-06-12 21:34:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:12,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032957144] [2021-06-12 21:34:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:13,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032957144] [2021-06-12 21:34:13,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032957144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854084074] [2021-06-12 21:34:13,124 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 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 21:34:13,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:34:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:13,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:34:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:15,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,042 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 21:34:15,106 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 21:34:15,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,140 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 21:34:15,204 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 21:34:15,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,260 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 21:34:15,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:34:15,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:15,477 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 21:34:15,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:249 [2021-06-12 21:34:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854084074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:15,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:15,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-12 21:34:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686088263] [2021-06-12 21:34:15,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=437, Unknown=2, NotChecked=0, Total=506 [2021-06-12 21:34:15,711 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:29,923 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-12 21:34:47,790 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:34:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:54,116 INFO L93 Difference]: Finished difference Result 3899 states and 12544 transitions. [2021-06-12 21:34:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:34:54,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:34:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:54,122 INFO L225 Difference]: With dead ends: 3899 [2021-06-12 21:34:54,122 INFO L226 Difference]: Without dead ends: 3884 [2021-06-12 21:34:54,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 15859.0ms TimeCoverageRelationStatistics Valid=393, Invalid=2460, Unknown=9, NotChecked=0, Total=2862 [2021-06-12 21:34:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2021-06-12 21:34:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2950. [2021-06-12 21:34:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-12 21:34:54,177 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-12 21:34:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:54,177 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-12 21:34:54,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-12 21:34:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:54,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:54,181 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:54,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 21:34:54,382 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1739469989, now seen corresponding path program 16 times [2021-06-12 21:34:54,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:54,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791748059] [2021-06-12 21:34:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:54,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:54,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791748059] [2021-06-12 21:34:54,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791748059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:54,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408364697] [2021-06-12 21:34:54,658 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 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 21:34:54,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:54,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:34:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:54,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:54,873 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 21:34:54,875 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 21:34:54,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:54,884 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 21:34:54,886 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 21:34:54,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:54,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:54,898 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 21:34:54,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:54,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:54,909 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 21:34:54,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:34:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:54,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408364697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:54,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:54,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 21:34:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969393653] [2021-06-12 21:34:54,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:34:54,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:34:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:34:54,929 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 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 21:34:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:55,680 INFO L93 Difference]: Finished difference Result 3677 states and 11946 transitions. [2021-06-12 21:34:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:34:55,681 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 30 [2021-06-12 21:34:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:55,686 INFO L225 Difference]: With dead ends: 3677 [2021-06-12 21:34:55,686 INFO L226 Difference]: Without dead ends: 3662 [2021-06-12 21:34:55,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:34:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-06-12 21:34:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2962. [2021-06-12 21:34:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 3.2971968929415736) internal successors, (9763), 2961 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 9763 transitions. [2021-06-12 21:34:55,732 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 9763 transitions. Word has length 30 [2021-06-12 21:34:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:55,732 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 9763 transitions. [2021-06-12 21:34:55,732 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 21:34:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 9763 transitions. [2021-06-12 21:34:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:55,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:55,735 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:55,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 21:34:55,936 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:55,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2120947529, now seen corresponding path program 17 times [2021-06-12 21:34:55,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:55,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419160030] [2021-06-12 21:34:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:56,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:56,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419160030] [2021-06-12 21:34:56,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419160030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119537091] [2021-06-12 21:34:56,209 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 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 21:34:56,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:34:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:34:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:56,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:56,486 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 21:34:56,488 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 21:34:56,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:56,498 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 21:34:56,500 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 21:34:56,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,512 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 21:34:56,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,522 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 21:34:56,522 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:34:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119537091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:56,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:34:56,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106254114] [2021-06-12 21:34:56,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:56,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:56,537 INFO L87 Difference]: Start difference. First operand 2962 states and 9763 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:58,160 INFO L93 Difference]: Finished difference Result 3790 states and 12239 transitions. [2021-06-12 21:34:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:34:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:34:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:58,167 INFO L225 Difference]: With dead ends: 3790 [2021-06-12 21:34:58,167 INFO L226 Difference]: Without dead ends: 3775 [2021-06-12 21:34:58,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1474.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:34:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-12 21:34:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2971. [2021-06-12 21:34:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.299326599326599) internal successors, (9799), 2970 states have internal predecessors, (9799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 9799 transitions. [2021-06-12 21:34:58,205 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 9799 transitions. Word has length 30 [2021-06-12 21:34:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:58,205 INFO L482 AbstractCegarLoop]: Abstraction has 2971 states and 9799 transitions. [2021-06-12 21:34:58,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 9799 transitions. [2021-06-12 21:34:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:58,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:58,209 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:58,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-06-12 21:34:58,413 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2051870483, now seen corresponding path program 18 times [2021-06-12 21:34:58,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:58,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215276758] [2021-06-12 21:34:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:58,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215276758] [2021-06-12 21:34:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215276758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550976310] [2021-06-12 21:34:58,723 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:34:58,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:34:58,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:34:58,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:59,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,027 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 21:34:59,094 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 21:34:59,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,118 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 21:34:59,163 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 21:34:59,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,204 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 21:34:59,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:34:59,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:59,289 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 21:34:59,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:125 [2021-06-12 21:34:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:59,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550976310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:59,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:59,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-12 21:34:59,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861354814] [2021-06-12 21:34:59,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:59,456 INFO L87 Difference]: Start difference. First operand 2971 states and 9799 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:00,438 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-12 21:35:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:02,325 INFO L93 Difference]: Finished difference Result 4131 states and 13257 transitions. [2021-06-12 21:35:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:35:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:35:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:02,332 INFO L225 Difference]: With dead ends: 4131 [2021-06-12 21:35:02,332 INFO L226 Difference]: Without dead ends: 4097 [2021-06-12 21:35:02,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2275.9ms TimeCoverageRelationStatistics Valid=400, Invalid=3760, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:35:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-06-12 21:35:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 2977. [2021-06-12 21:35:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-06-12 21:35:02,374 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-06-12 21:35:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:02,375 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-06-12 21:35:02,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-06-12 21:35:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:02,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:02,378 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:02,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:02,579 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1768820973, now seen corresponding path program 19 times [2021-06-12 21:35:02,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:02,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273987173] [2021-06-12 21:35:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:02,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:02,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273987173] [2021-06-12 21:35:02,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273987173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:02,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438655803] [2021-06-12 21:35:02,810 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 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 21:35:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:35:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:03,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,006 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 21:35:03,023 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 21:35:03,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:03,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,042 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 21:35:03,058 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 21:35:03,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,089 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 21:35:03,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:03,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:03,162 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 21:35:03,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-12 21:35:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:03,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438655803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:03,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:03,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 21:35:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794508151] [2021-06-12 21:35:03,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:35:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:35:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:35:03,203 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:35:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:04,406 INFO L93 Difference]: Finished difference Result 4309 states and 13904 transitions. [2021-06-12 21:35:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:35:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-06-12 21:35:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:04,413 INFO L225 Difference]: With dead ends: 4309 [2021-06-12 21:35:04,413 INFO L226 Difference]: Without dead ends: 4294 [2021-06-12 21:35:04,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1076.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:35:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-06-12 21:35:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 2977. [2021-06-12 21:35:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-06-12 21:35:04,458 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-06-12 21:35:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:04,458 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-06-12 21:35:04,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:35:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-06-12 21:35:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:04,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:04,462 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:04,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 21:35:04,663 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1143205165, now seen corresponding path program 20 times [2021-06-12 21:35:04,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:04,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634190605] [2021-06-12 21:35:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:04,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:04,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634190605] [2021-06-12 21:35:04,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634190605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:04,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657114819] [2021-06-12 21:35:04,950 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:04,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:35:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:05,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,159 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-06-12 21:35:05,194 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 21:35:05,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,222 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:35:05,273 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 21:35:05,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,317 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 21:35:05,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:05,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:05,468 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 21:35:05,468 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:488 [2021-06-12 21:35:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657114819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:05,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:05,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 21:35:05,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113646644] [2021-06-12 21:35:05,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:35:05,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:05,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:35:05,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:35:05,665 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:09,023 INFO L93 Difference]: Finished difference Result 4831 states and 15358 transitions. [2021-06-12 21:35:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:35:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:35:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:09,030 INFO L225 Difference]: With dead ends: 4831 [2021-06-12 21:35:09,031 INFO L226 Difference]: Without dead ends: 4797 [2021-06-12 21:35:09,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2826.7ms TimeCoverageRelationStatistics Valid=560, Invalid=3996, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:35:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-12 21:35:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 2999. [2021-06-12 21:35:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.3102068045363575) internal successors, (9924), 2998 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9924 transitions. [2021-06-12 21:35:09,081 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9924 transitions. Word has length 30 [2021-06-12 21:35:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:09,081 INFO L482 AbstractCegarLoop]: Abstraction has 2999 states and 9924 transitions. [2021-06-12 21:35:09,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9924 transitions. [2021-06-12 21:35:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:09,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:09,085 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:09,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 21:35:09,285 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 468442303, now seen corresponding path program 21 times [2021-06-12 21:35:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:09,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285411469] [2021-06-12 21:35:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:09,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:09,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285411469] [2021-06-12 21:35:09,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285411469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:09,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257661110] [2021-06-12 21:35:09,566 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 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 21:35:09,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:35:09,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:35:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:09,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:09,787 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 21:35:09,907 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 21:35:09,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:09,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:09,941 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 21:35:09,998 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 21:35:10,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:10,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:10,051 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 21:35:10,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:10,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:10,231 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 7 xjuncts. [2021-06-12 21:35:10,231 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:345 [2021-06-12 21:35:10,447 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-12 21:35:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:10,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257661110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:10,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:10,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-12 21:35:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731986790] [2021-06-12 21:35:10,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:10,580 INFO L87 Difference]: Start difference. First operand 2999 states and 9924 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:21,658 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-12 21:35:23,500 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2021-06-12 21:35:23,629 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-12 21:35:24,523 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-12 21:35:25,161 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-06-12 21:35:29,622 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 21:35:35,202 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 21:35:38,053 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-12 21:35:39,775 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-12 21:35:44,259 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 21:35:46,518 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-12 21:35:50,250 WARN L205 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 21:35:52,341 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-12 21:35:52,549 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-12 21:35:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:52,847 INFO L93 Difference]: Finished difference Result 4802 states and 15302 transitions. [2021-06-12 21:35:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:35:52,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:35:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:52,854 INFO L225 Difference]: With dead ends: 4802 [2021-06-12 21:35:52,854 INFO L226 Difference]: Without dead ends: 4772 [2021-06-12 21:35:52,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 28676.9ms TimeCoverageRelationStatistics Valid=758, Invalid=3647, Unknown=17, NotChecked=0, Total=4422 [2021-06-12 21:35:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-12 21:35:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 2992. [2021-06-12 21:35:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.307255098629221) internal successors, (9892), 2991 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9892 transitions. [2021-06-12 21:35:52,902 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9892 transitions. Word has length 30 [2021-06-12 21:35:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:52,902 INFO L482 AbstractCegarLoop]: Abstraction has 2992 states and 9892 transitions. [2021-06-12 21:35:52,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9892 transitions. [2021-06-12 21:35:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:52,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:52,905 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:53,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 21:35:53,106 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash -472256647, now seen corresponding path program 22 times [2021-06-12 21:35:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:53,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319569126] [2021-06-12 21:35:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:53,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:53,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319569126] [2021-06-12 21:35:53,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319569126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:53,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608952] [2021-06-12 21:35:53,387 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 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 21:35:53,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:35:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:53,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,571 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 21:35:53,587 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 21:35:53,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:53,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,605 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 21:35:53,621 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 21:35:53,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,653 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 21:35:53,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:53,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:53,724 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 21:35:53,724 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-12 21:35:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:53,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:53,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:53,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 21:35:53,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860072622] [2021-06-12 21:35:53,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:35:53,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:35:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:35:53,765 INFO L87 Difference]: Start difference. First operand 2992 states and 9892 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:35:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:54,667 INFO L93 Difference]: Finished difference Result 4333 states and 13973 transitions. [2021-06-12 21:35:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:35:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-06-12 21:35:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:54,673 INFO L225 Difference]: With dead ends: 4333 [2021-06-12 21:35:54,673 INFO L226 Difference]: Without dead ends: 4308 [2021-06-12 21:35:54,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 757.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:35:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-06-12 21:35:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 2983. [2021-06-12 21:35:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.3031522468142187) internal successors, (9850), 2982 states have internal predecessors, (9850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 9850 transitions. [2021-06-12 21:35:54,716 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 9850 transitions. Word has length 30 [2021-06-12 21:35:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:54,716 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 9850 transitions. [2021-06-12 21:35:54,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:35:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 9850 transitions. [2021-06-12 21:35:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:54,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:54,719 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:54,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-12 21:35:54,920 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:54,920 INFO L82 PathProgramCache]: Analyzing trace with hash -111158881, now seen corresponding path program 23 times [2021-06-12 21:35:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:54,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314727275] [2021-06-12 21:35:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:55,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314727275] [2021-06-12 21:35:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314727275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016087348] [2021-06-12 21:35:55,237 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 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 21:35:55,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:35:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:35:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,442 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-12 21:35:55,461 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 21:35:55,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 21:35:55,500 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 21:35:55,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,532 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 21:35:55,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:55,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,586 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 21:35:55,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:26 [2021-06-12 21:35:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016087348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:55,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:55,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:35:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602815934] [2021-06-12 21:35:55,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:55,633 INFO L87 Difference]: Start difference. First operand 2983 states and 9850 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:57,109 INFO L93 Difference]: Finished difference Result 4532 states and 14620 transitions. [2021-06-12 21:35:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:35:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:35:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:57,115 INFO L225 Difference]: With dead ends: 4532 [2021-06-12 21:35:57,115 INFO L226 Difference]: Without dead ends: 4482 [2021-06-12 21:35:57,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1220.7ms TimeCoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:35:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-06-12 21:35:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2977. [2021-06-12 21:35:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.302755376344086) internal successors, (9829), 2976 states have internal predecessors, (9829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9829 transitions. [2021-06-12 21:35:57,157 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9829 transitions. Word has length 30 [2021-06-12 21:35:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:57,157 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9829 transitions. [2021-06-12 21:35:57,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9829 transitions. [2021-06-12 21:35:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:57,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:57,161 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:57,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:57,361 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash 947471975, now seen corresponding path program 24 times [2021-06-12 21:35:57,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:57,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689813632] [2021-06-12 21:35:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:57,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689813632] [2021-06-12 21:35:57,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689813632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650045587] [2021-06-12 21:35:57,671 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 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 21:35:57,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:35:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:35:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:57,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,834 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:35:57,852 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 21:35:57,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:57,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,870 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:35:57,886 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 21:35:57,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,915 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 21:35:57,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:57,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:57,971 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 21:35:57,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:35:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:58,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650045587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:58,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:58,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:35:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990175782] [2021-06-12 21:35:58,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:58,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:58,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:58,025 INFO L87 Difference]: Start difference. First operand 2977 states and 9829 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:59,377 INFO L93 Difference]: Finished difference Result 4246 states and 13807 transitions. [2021-06-12 21:35:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:35:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:35:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:59,383 INFO L225 Difference]: With dead ends: 4246 [2021-06-12 21:35:59,383 INFO L226 Difference]: Without dead ends: 4221 [2021-06-12 21:35:59,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1289.8ms TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:35:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-06-12 21:35:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2974. [2021-06-12 21:35:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2973 states have (on average 3.3030608812647158) internal successors, (9820), 2973 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 9820 transitions. [2021-06-12 21:35:59,426 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 9820 transitions. Word has length 30 [2021-06-12 21:35:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:59,426 INFO L482 AbstractCegarLoop]: Abstraction has 2974 states and 9820 transitions. [2021-06-12 21:35:59,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 9820 transitions. [2021-06-12 21:35:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:35:59,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:59,430 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:59,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:59,630 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash 255536197, now seen corresponding path program 25 times [2021-06-12 21:35:59,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:59,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556782420] [2021-06-12 21:35:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:59,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556782420] [2021-06-12 21:35:59,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556782420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355318547] [2021-06-12 21:35:59,937 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 21:35:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:59,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:35:59,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:00,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:00,145 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 21:36:00,148 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 21:36:00,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:00,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:00,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:00,156 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 21:36:00,158 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 21:36:00,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:00,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:00,169 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 21:36:00,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:00,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:00,179 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 21:36:00,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:36:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:00,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355318547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:00,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:00,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:36:00,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658431603] [2021-06-12 21:36:00,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:36:00,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:36:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:36:00,194 INFO L87 Difference]: Start difference. First operand 2974 states and 9820 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:01,366 INFO L93 Difference]: Finished difference Result 3865 states and 12530 transitions. [2021-06-12 21:36:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:36:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:01,372 INFO L225 Difference]: With dead ends: 3865 [2021-06-12 21:36:01,372 INFO L226 Difference]: Without dead ends: 3844 [2021-06-12 21:36:01,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:36:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-12 21:36:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 2998. [2021-06-12 21:36:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.300633967300634) internal successors, (9892), 2997 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 9892 transitions. [2021-06-12 21:36:01,412 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 9892 transitions. Word has length 30 [2021-06-12 21:36:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:01,412 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 9892 transitions. [2021-06-12 21:36:01,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 9892 transitions. [2021-06-12 21:36:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:01,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:01,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:01,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:01,616 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1899460529, now seen corresponding path program 26 times [2021-06-12 21:36:01,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:01,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613337029] [2021-06-12 21:36:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:01,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:01,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613337029] [2021-06-12 21:36:01,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613337029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:01,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299361926] [2021-06-12 21:36:01,949 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 21:36:01,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:01,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:01,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:36:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:02,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21:36:02,192 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 21:36:02,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:02,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,209 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 21:36:02,237 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 21:36:02,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,270 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 21:36:02,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:02,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:02,328 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 21:36:02,328 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-12 21:36:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:02,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299361926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:02,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:02,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:36:02,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125907589] [2021-06-12 21:36:02,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:36:02,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:02,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:36:02,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:36:02,375 INFO L87 Difference]: Start difference. First operand 2998 states and 9892 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:02,715 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-06-12 21:36:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:04,060 INFO L93 Difference]: Finished difference Result 4126 states and 13340 transitions. [2021-06-12 21:36:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:36:04,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:04,067 INFO L225 Difference]: With dead ends: 4126 [2021-06-12 21:36:04,067 INFO L226 Difference]: Without dead ends: 4078 [2021-06-12 21:36:04,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1391.6ms TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:36:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-06-12 21:36:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3013. [2021-06-12 21:36:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 3.300132802124834) internal successors, (9940), 3012 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 9940 transitions. [2021-06-12 21:36:04,110 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 9940 transitions. Word has length 30 [2021-06-12 21:36:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:04,110 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 9940 transitions. [2021-06-12 21:36:04,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 9940 transitions. [2021-06-12 21:36:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:04,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:04,113 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:04,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:04,314 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1021832757, now seen corresponding path program 27 times [2021-06-12 21:36:04,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:04,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171545547] [2021-06-12 21:36:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:04,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:04,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171545547] [2021-06-12 21:36:04,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171545547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:04,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530061741] [2021-06-12 21:36:04,615 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 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 21:36:04,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:36:04,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:36:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:04,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:04,770 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 21:36:04,810 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 21:36:04,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:04,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:04,835 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 21:36:04,874 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 21:36:04,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:04,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:04,915 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 21:36:04,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:04,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:05,007 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 21:36:05,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:71 [2021-06-12 21:36:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530061741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:05,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 21:36:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361789114] [2021-06-12 21:36:05,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:36:05,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:36:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:36:05,196 INFO L87 Difference]: Start difference. First operand 3013 states and 9940 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:06,538 INFO L93 Difference]: Finished difference Result 4330 states and 13993 transitions. [2021-06-12 21:36:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:36:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:06,547 INFO L225 Difference]: With dead ends: 4330 [2021-06-12 21:36:06,547 INFO L226 Difference]: Without dead ends: 4280 [2021-06-12 21:36:06,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1291.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:36:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-06-12 21:36:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3038. [2021-06-12 21:36:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.296674349687191) internal successors, (10012), 3037 states have internal predecessors, (10012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10012 transitions. [2021-06-12 21:36:06,588 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10012 transitions. Word has length 30 [2021-06-12 21:36:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:06,588 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10012 transitions. [2021-06-12 21:36:06,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10012 transitions. [2021-06-12 21:36:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:06,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:06,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:06,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-12 21:36:06,797 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 825383695, now seen corresponding path program 28 times [2021-06-12 21:36:06,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:06,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018858212] [2021-06-12 21:36:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018858212] [2021-06-12 21:36:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018858212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539539868] [2021-06-12 21:36:07,131 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 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 21:36:07,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:07,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:36:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:07,364 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 64 treesize of output 52 [2021-06-12 21:36:07,366 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 21:36:07,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:07,376 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 52 treesize of output 40 [2021-06-12 21:36:07,379 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 21:36:07,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:07,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:07,393 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 40 treesize of output 28 [2021-06-12 21:36:07,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:07,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:07,404 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 21:36:07,404 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-12 21:36:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539539868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:07,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:07,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 21:36:07,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027795965] [2021-06-12 21:36:07,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:36:07,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:36:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:36:07,425 INFO L87 Difference]: Start difference. First operand 3038 states and 10012 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 21:36:09,539 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-12 21:36:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:10,471 INFO L93 Difference]: Finished difference Result 3212 states and 10480 transitions. [2021-06-12 21:36:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:36:10,472 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 30 [2021-06-12 21:36:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:10,476 INFO L225 Difference]: With dead ends: 3212 [2021-06-12 21:36:10,476 INFO L226 Difference]: Without dead ends: 3193 [2021-06-12 21:36:10,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2298.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:36:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-12 21:36:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3046. [2021-06-12 21:36:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.295894909688013) internal successors, (10036), 3045 states have internal predecessors, (10036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10036 transitions. [2021-06-12 21:36:10,513 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10036 transitions. Word has length 30 [2021-06-12 21:36:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:10,513 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10036 transitions. [2021-06-12 21:36:10,513 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 21:36:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10036 transitions. [2021-06-12 21:36:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:10,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:10,516 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:10,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:10,717 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1670580273, now seen corresponding path program 29 times [2021-06-12 21:36:10,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:10,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836545026] [2021-06-12 21:36:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:10,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:10,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836545026] [2021-06-12 21:36:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836545026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:10,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507712406] [2021-06-12 21:36:10,977 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 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 21:36:11,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:36:11,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:11,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:36:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,155 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 21:36:11,227 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 21:36:11,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,252 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 21:36:11,294 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 21:36:11,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,335 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 21:36:11,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:11,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,465 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 21:36:11,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:82 [2021-06-12 21:36:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:11,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507712406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:11,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:11,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:36:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722585816] [2021-06-12 21:36:11,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:36:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:36:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:36:11,590 INFO L87 Difference]: Start difference. First operand 3046 states and 10036 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 21:36:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:12,843 INFO L93 Difference]: Finished difference Result 4508 states and 14544 transitions. [2021-06-12 21:36:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:36:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 21:36:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:12,849 INFO L225 Difference]: With dead ends: 4508 [2021-06-12 21:36:12,850 INFO L226 Difference]: Without dead ends: 4483 [2021-06-12 21:36:12,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1209.6ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:36:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-06-12 21:36:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3095. [2021-06-12 21:36:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 3.2937944408532642) internal successors, (10191), 3094 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 10191 transitions. [2021-06-12 21:36:12,892 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 10191 transitions. Word has length 30 [2021-06-12 21:36:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:12,892 INFO L482 AbstractCegarLoop]: Abstraction has 3095 states and 10191 transitions. [2021-06-12 21:36:12,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 21:36:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 10191 transitions. [2021-06-12 21:36:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:12,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:12,895 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:13,096 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1765440369, now seen corresponding path program 30 times [2021-06-12 21:36:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:13,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956406696] [2021-06-12 21:36:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:13,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956406696] [2021-06-12 21:36:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956406696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781191185] [2021-06-12 21:36:13,361 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 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 21:36:13,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:36:13,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:36:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:13,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,528 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 21:36:13,545 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 21:36:13,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:13,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,561 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:36:13,576 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 21:36:13,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,602 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 21:36:13,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:13,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:13,654 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 21:36:13,654 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-12 21:36:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:13,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781191185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:13,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:13,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:36:13,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269664112] [2021-06-12 21:36:13,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:36:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:36:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:36:13,707 INFO L87 Difference]: Start difference. First operand 3095 states and 10191 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:15,093 INFO L93 Difference]: Finished difference Result 4219 states and 13699 transitions. [2021-06-12 21:36:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:36:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:15,099 INFO L225 Difference]: With dead ends: 4219 [2021-06-12 21:36:15,099 INFO L226 Difference]: Without dead ends: 4194 [2021-06-12 21:36:15,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1159.5ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:36:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-06-12 21:36:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3103. [2021-06-12 21:36:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-06-12 21:36:15,144 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-06-12 21:36:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:15,144 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-06-12 21:36:15,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-06-12 21:36:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:15,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:15,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:15,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:15,348 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash 879258491, now seen corresponding path program 31 times [2021-06-12 21:36:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:15,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62251141] [2021-06-12 21:36:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:15,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62251141] [2021-06-12 21:36:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62251141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314077842] [2021-06-12 21:36:15,625 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 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 21:36:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:36:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:15,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,800 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-12 21:36:15,816 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 21:36:15,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:15,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,835 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 21:36:15,863 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 21:36:15,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,893 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 21:36:15,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:15,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:15,960 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 21:36:15,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-12 21:36:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:16,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314077842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:16,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:16,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:36:16,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151884485] [2021-06-12 21:36:16,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:36:16,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:36:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:36:16,024 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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 21:36:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:17,045 INFO L93 Difference]: Finished difference Result 4326 states and 14033 transitions. [2021-06-12 21:36:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:36:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-06-12 21:36:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:17,051 INFO L225 Difference]: With dead ends: 4326 [2021-06-12 21:36:17,051 INFO L226 Difference]: Without dead ends: 4301 [2021-06-12 21:36:17,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 928.8ms TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:36:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-12 21:36:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3103. [2021-06-12 21:36:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-06-12 21:36:17,095 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-06-12 21:36:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:17,095 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-06-12 21:36:17,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 21:36:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-06-12 21:36:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:17,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:17,098 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:36:17,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-12 21:36:17,300 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:17,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2131402188, now seen corresponding path program 44 times [2021-06-12 21:36:17,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:17,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384506823] [2021-06-12 21:36:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:17,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384506823] [2021-06-12 21:36:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384506823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727450588] [2021-06-12 21:36:17,646 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 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 21:36:17,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:36:17,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:17,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:17,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:17,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:17,839 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 21:36:17,841 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 21:36:17,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:17,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:17,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:17,850 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 21:36:17,852 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 21:36:17,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:17,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:17,862 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 21:36:17,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:17,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:17,872 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 21:36:17,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:36:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727450588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:36:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845059971] [2021-06-12 21:36:17,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:36:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:36:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:36:17,894 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:19,497 INFO L93 Difference]: Finished difference Result 4106 states and 13120 transitions. [2021-06-12 21:36:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:36:19,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:19,504 INFO L225 Difference]: With dead ends: 4106 [2021-06-12 21:36:19,504 INFO L226 Difference]: Without dead ends: 4080 [2021-06-12 21:36:19,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1561.0ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:36:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-06-12 21:36:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3097. [2021-06-12 21:36:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 3.294573643410853) internal successors, (10200), 3096 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 10200 transitions. [2021-06-12 21:36:19,549 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 10200 transitions. Word has length 30 [2021-06-12 21:36:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:19,549 INFO L482 AbstractCegarLoop]: Abstraction has 3097 states and 10200 transitions. [2021-06-12 21:36:19,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 10200 transitions. [2021-06-12 21:36:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:19,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:19,553 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:36:19,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:19,753 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1986525082, now seen corresponding path program 45 times [2021-06-12 21:36:19,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:19,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892204640] [2021-06-12 21:36:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:20,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:20,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892204640] [2021-06-12 21:36:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892204640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:20,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621197414] [2021-06-12 21:36:20,110 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 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 21:36:20,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:36:20,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:36:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:20,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:20,419 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 21:36:20,500 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 21:36:20,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:20,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:20,537 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 21:36:20,619 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 21:36:20,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:20,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:20,686 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 21:36:20,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:21,313 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2021-06-12 21:36:21,313 INFO L628 ElimStorePlain]: treesize reduction 900, result has 54.5 percent of original size [2021-06-12 21:36:21,575 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 21:36:21,575 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:54 [2021-06-12 21:36:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:21,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621197414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:21,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:21,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:36:21,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705441462] [2021-06-12 21:36:21,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:21,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:21,673 INFO L87 Difference]: Start difference. First operand 3097 states and 10200 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:24,415 INFO L93 Difference]: Finished difference Result 4278 states and 13633 transitions. [2021-06-12 21:36:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:36:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:24,422 INFO L225 Difference]: With dead ends: 4278 [2021-06-12 21:36:24,422 INFO L226 Difference]: Without dead ends: 4237 [2021-06-12 21:36:24,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2265.4ms TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 21:36:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-12 21:36:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3137. [2021-06-12 21:36:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 3.2901785714285716) internal successors, (10318), 3136 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 10318 transitions. [2021-06-12 21:36:24,463 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 10318 transitions. Word has length 30 [2021-06-12 21:36:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:24,463 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 10318 transitions. [2021-06-12 21:36:24,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 10318 transitions. [2021-06-12 21:36:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:24,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:24,467 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:36:24,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-12 21:36:24,667 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2024287664, now seen corresponding path program 46 times [2021-06-12 21:36:24,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:24,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770636369] [2021-06-12 21:36:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:24,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770636369] [2021-06-12 21:36:24,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770636369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170436941] [2021-06-12 21:36:24,991 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:25,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:25,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:36:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:26,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:26,669 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 21:36:26,670 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 21:36:26,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:26,682 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 21:36:26,683 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 21:36:26,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:26,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:26,709 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 21:36:26,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:26,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:26,719 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 21:36:26,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:36:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:26,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170436941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:26,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:26,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-12 21:36:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119954287] [2021-06-12 21:36:26,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:36:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:36:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=383, Unknown=2, NotChecked=0, Total=462 [2021-06-12 21:36:26,740 INFO L87 Difference]: Start difference. First operand 3137 states and 10318 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:55,624 INFO L93 Difference]: Finished difference Result 4277 states and 13788 transitions. [2021-06-12 21:36:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:36:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:55,631 INFO L225 Difference]: With dead ends: 4277 [2021-06-12 21:36:55,631 INFO L226 Difference]: Without dead ends: 4251 [2021-06-12 21:36:55,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 15699.1ms TimeCoverageRelationStatistics Valid=517, Invalid=3007, Unknown=16, NotChecked=0, Total=3540 [2021-06-12 21:36:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-12 21:36:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3157. [2021-06-12 21:36:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-06-12 21:36:55,674 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-06-12 21:36:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:55,674 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-06-12 21:36:55,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-06-12 21:36:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:55,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:55,678 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:36:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-06-12 21:36:55,878 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -695963646, now seen corresponding path program 47 times [2021-06-12 21:36:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:55,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920286498] [2021-06-12 21:36:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:56,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:56,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920286498] [2021-06-12 21:36:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920286498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:56,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039607756] [2021-06-12 21:36:56,229 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 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 21:36:56,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:36:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:36:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:56,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:56,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:56,478 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 21:36:56,480 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 21:36:56,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:56,490 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 21:36:56,491 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 21:36:56,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,503 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 21:36:56,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,514 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 21:36:56,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:36:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:56,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039607756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:56,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:56,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-12 21:36:56,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320750121] [2021-06-12 21:36:56,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:36:56,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:36:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:36:56,531 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:58,927 INFO L93 Difference]: Finished difference Result 4084 states and 13096 transitions. [2021-06-12 21:36:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:36:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:36:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:58,933 INFO L225 Difference]: With dead ends: 4084 [2021-06-12 21:36:58,933 INFO L226 Difference]: Without dead ends: 4058 [2021-06-12 21:36:58,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2050.4ms TimeCoverageRelationStatistics Valid=546, Invalid=3360, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:36:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-12 21:36:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3157. [2021-06-12 21:36:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-06-12 21:36:58,977 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-06-12 21:36:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:58,977 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-06-12 21:36:58,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-06-12 21:36:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:36:58,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:58,981 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:59,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:59,182 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1511030885, now seen corresponding path program 32 times [2021-06-12 21:36:59,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:59,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115618034] [2021-06-12 21:36:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:59,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115618034] [2021-06-12 21:36:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115618034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416719918] [2021-06-12 21:36:59,474 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 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 21:36:59,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:36:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:59,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:59,719 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 21:36:59,774 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 21:36:59,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:59,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:59,801 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 21:36:59,852 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 21:36:59,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:59,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:59,895 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 21:36:59,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:36:59,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:00,033 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 21:37:00,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:153 [2021-06-12 21:37:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:00,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416719918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:00,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:00,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 21:37:00,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104338462] [2021-06-12 21:37:00,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:37:00,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:37:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:37:00,098 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:02,854 INFO L93 Difference]: Finished difference Result 4748 states and 14976 transitions. [2021-06-12 21:37:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:37:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:02,861 INFO L225 Difference]: With dead ends: 4748 [2021-06-12 21:37:02,861 INFO L226 Difference]: Without dead ends: 4718 [2021-06-12 21:37:02,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2263.7ms TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:37:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2021-06-12 21:37:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 3186. [2021-06-12 21:37:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.2910518053375197) internal successors, (10482), 3185 states have internal predecessors, (10482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10482 transitions. [2021-06-12 21:37:02,905 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10482 transitions. Word has length 30 [2021-06-12 21:37:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:02,906 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10482 transitions. [2021-06-12 21:37:02,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10482 transitions. [2021-06-12 21:37:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:02,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:02,909 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:03,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-12 21:37:03,110 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 871210921, now seen corresponding path program 33 times [2021-06-12 21:37:03,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:03,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757311260] [2021-06-12 21:37:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:03,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757311260] [2021-06-12 21:37:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757311260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422436529] [2021-06-12 21:37:03,430 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 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 21:37:03,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:37:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:37:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:03,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:03,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,634 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 21:37:03,667 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 21:37:03,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:03,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,695 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 21:37:03,735 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 21:37:03,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,777 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 21:37:03,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:03,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:03,883 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 6 xjuncts. [2021-06-12 21:37:03,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:251 [2021-06-12 21:37:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422436529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:03,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:03,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:37:03,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266289542] [2021-06-12 21:37:03,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:37:03,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:03,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:37:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:37:03,970 INFO L87 Difference]: Start difference. First operand 3186 states and 10482 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:04,259 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-12 21:37:07,202 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-12 21:37:09,032 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-12 21:37:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:14,294 INFO L93 Difference]: Finished difference Result 5204 states and 16501 transitions. [2021-06-12 21:37:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:37:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-06-12 21:37:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:14,302 INFO L225 Difference]: With dead ends: 5204 [2021-06-12 21:37:14,302 INFO L226 Difference]: Without dead ends: 5185 [2021-06-12 21:37:14,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3552.3ms TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:37:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-06-12 21:37:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 3197. [2021-06-12 21:37:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.292866082603254) internal successors, (10524), 3196 states have internal predecessors, (10524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10524 transitions. [2021-06-12 21:37:14,355 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10524 transitions. Word has length 30 [2021-06-12 21:37:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:14,355 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10524 transitions. [2021-06-12 21:37:14,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10524 transitions. [2021-06-12 21:37:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:14,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:14,359 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:14,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-12 21:37:14,575 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1742930817, now seen corresponding path program 34 times [2021-06-12 21:37:14,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:14,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182451646] [2021-06-12 21:37:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:14,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182451646] [2021-06-12 21:37:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182451646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525135849] [2021-06-12 21:37:14,911 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 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 21:37:14,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:37:14,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:14,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:37:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:15,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:15,193 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 21:37:15,195 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 21:37:15,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:15,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:15,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:15,205 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 21:37:15,207 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 21:37:15,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:15,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:15,220 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 21:37:15,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:15,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:15,232 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 21:37:15,232 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-12 21:37:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:15,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525135849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:15,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:15,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:37:15,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939359117] [2021-06-12 21:37:15,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:37:15,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:37:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:37:15,252 INFO L87 Difference]: Start difference. First operand 3197 states and 10524 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:17,703 INFO L93 Difference]: Finished difference Result 4615 states and 14674 transitions. [2021-06-12 21:37:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:37:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:17,711 INFO L225 Difference]: With dead ends: 4615 [2021-06-12 21:37:17,711 INFO L226 Difference]: Without dead ends: 4600 [2021-06-12 21:37:17,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2235.4ms TimeCoverageRelationStatistics Valid=620, Invalid=2686, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:37:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-06-12 21:37:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3186. [2021-06-12 21:37:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.290423861852433) internal successors, (10480), 3185 states have internal predecessors, (10480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10480 transitions. [2021-06-12 21:37:17,759 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10480 transitions. Word has length 30 [2021-06-12 21:37:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:17,759 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10480 transitions. [2021-06-12 21:37:17,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10480 transitions. [2021-06-12 21:37:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:17,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:17,763 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:37:17,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1226,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:17,980 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 701763704, now seen corresponding path program 48 times [2021-06-12 21:37:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:17,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833022448] [2021-06-12 21:37:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:18,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:18,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833022448] [2021-06-12 21:37:18,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833022448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:18,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385575013] [2021-06-12 21:37:18,593 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 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 21:37:18,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:37:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:18,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:18,803 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 21:37:18,804 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 21:37:18,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:18,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:18,814 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 21:37:18,816 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 21:37:18,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:18,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:18,827 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 21:37:18,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:18,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:18,837 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 21:37:18,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:37:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385575013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:18,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:18,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:37:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735475595] [2021-06-12 21:37:18,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:37:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:37:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:37:18,854 INFO L87 Difference]: Start difference. First operand 3186 states and 10480 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:21,054 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-12 21:37:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:23,201 INFO L93 Difference]: Finished difference Result 4817 states and 15194 transitions. [2021-06-12 21:37:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 21:37:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:23,208 INFO L225 Difference]: With dead ends: 4817 [2021-06-12 21:37:23,208 INFO L226 Difference]: Without dead ends: 4788 [2021-06-12 21:37:23,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 3972.4ms TimeCoverageRelationStatistics Valid=1355, Invalid=7765, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 21:37:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-06-12 21:37:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3197. [2021-06-12 21:37:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.2947434292866085) internal successors, (10530), 3196 states have internal predecessors, (10530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10530 transitions. [2021-06-12 21:37:23,263 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10530 transitions. Word has length 30 [2021-06-12 21:37:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:23,263 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10530 transitions. [2021-06-12 21:37:23,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10530 transitions. [2021-06-12 21:37:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:23,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:23,267 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:37:23,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-12 21:37:23,467 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash -597068292, now seen corresponding path program 49 times [2021-06-12 21:37:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:23,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24091114] [2021-06-12 21:37:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:23,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24091114] [2021-06-12 21:37:23,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24091114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589829019] [2021-06-12 21:37:23,753 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 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 21:37:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:23,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:23,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:23,970 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 21:37:23,971 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 21:37:23,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:23,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:23,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:23,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:23,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:23,981 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 21:37:23,982 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 21:37:23,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:23,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:23,994 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 21:37:23,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:24,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:24,003 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 21:37:24,004 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-12 21:37:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:24,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589829019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:24,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:24,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:37:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239051610] [2021-06-12 21:37:24,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:37:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:37:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:37:24,025 INFO L87 Difference]: Start difference. First operand 3197 states and 10530 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:26,919 INFO L93 Difference]: Finished difference Result 5801 states and 18343 transitions. [2021-06-12 21:37:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:37:26,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:26,928 INFO L225 Difference]: With dead ends: 5801 [2021-06-12 21:37:26,928 INFO L226 Difference]: Without dead ends: 5780 [2021-06-12 21:37:26,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2178.0ms TimeCoverageRelationStatistics Valid=672, Invalid=4158, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:37:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-06-12 21:37:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 3340. [2021-06-12 21:37:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 3.2946990116801436) internal successors, (11001), 3339 states have internal predecessors, (11001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 11001 transitions. [2021-06-12 21:37:26,983 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 11001 transitions. Word has length 30 [2021-06-12 21:37:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:26,983 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 11001 transitions. [2021-06-12 21:37:26,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 11001 transitions. [2021-06-12 21:37:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:26,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:26,987 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:37:27,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:27,188 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1176039544, now seen corresponding path program 50 times [2021-06-12 21:37:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:27,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308633862] [2021-06-12 21:37:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:27,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308633862] [2021-06-12 21:37:27,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308633862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110348364] [2021-06-12 21:37:27,474 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 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 21:37:27,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:37:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:37:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:27,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:27,736 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 21:37:27,819 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 21:37:27,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:27,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:27,889 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 21:37:27,961 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 21:37:27,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:28,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:28,028 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 21:37:28,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:28,727 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-06-12 21:37:28,728 INFO L628 ElimStorePlain]: treesize reduction 44, result has 97.8 percent of original size [2021-06-12 21:37:29,160 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 21:37:29,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:34 [2021-06-12 21:37:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110348364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:29,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:29,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-12 21:37:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700188055] [2021-06-12 21:37:29,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:37:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:37:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:37:29,242 INFO L87 Difference]: Start difference. First operand 3340 states and 11001 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:32,593 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-12 21:37:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:34,656 INFO L93 Difference]: Finished difference Result 7449 states and 23005 transitions. [2021-06-12 21:37:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 21:37:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:34,666 INFO L225 Difference]: With dead ends: 7449 [2021-06-12 21:37:34,666 INFO L226 Difference]: Without dead ends: 7336 [2021-06-12 21:37:34,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 4219.3ms TimeCoverageRelationStatistics Valid=1874, Invalid=9468, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 21:37:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2021-06-12 21:37:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 3586. [2021-06-12 21:37:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 3.300976290097629) internal successors, (11834), 3585 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 11834 transitions. [2021-06-12 21:37:34,735 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 11834 transitions. Word has length 30 [2021-06-12 21:37:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:34,735 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 11834 transitions. [2021-06-12 21:37:34,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 11834 transitions. [2021-06-12 21:37:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:34,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:34,748 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:34,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-06-12 21:37:34,961 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2047112795, now seen corresponding path program 35 times [2021-06-12 21:37:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:34,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233827123] [2021-06-12 21:37:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:35,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:35,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233827123] [2021-06-12 21:37:35,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233827123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:35,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387229493] [2021-06-12 21:37:35,261 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 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 21:37:35,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:37:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:35,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,446 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-12 21:37:35,462 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 21:37:35,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:35,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:37:35,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,487 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 21:37:35,504 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 21:37:35,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,540 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 21:37:35,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:35,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:35,625 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 21:37:35,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:45 [2021-06-12 21:37:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:35,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387229493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:35,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:35,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:37:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400969070] [2021-06-12 21:37:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:37:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:37:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:37:35,693 INFO L87 Difference]: Start difference. First operand 3586 states and 11834 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:38,036 INFO L93 Difference]: Finished difference Result 4765 states and 15502 transitions. [2021-06-12 21:37:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:37:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-06-12 21:37:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:38,044 INFO L225 Difference]: With dead ends: 4765 [2021-06-12 21:37:38,045 INFO L226 Difference]: Without dead ends: 4740 [2021-06-12 21:37:38,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2033.6ms TimeCoverageRelationStatistics Valid=526, Invalid=2554, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:37:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2021-06-12 21:37:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 3580. [2021-06-12 21:37:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-06-12 21:37:38,098 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-06-12 21:37:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:38,099 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-06-12 21:37:38,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-06-12 21:37:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:38,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:38,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:38,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-12 21:37:38,304 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1125030693, now seen corresponding path program 36 times [2021-06-12 21:37:38,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:38,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599747913] [2021-06-12 21:37:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:38,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599747913] [2021-06-12 21:37:38,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599747913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653482716] [2021-06-12 21:37:38,561 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 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 21:37:38,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:37:38,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:37:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:38,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,754 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 49 treesize of output 49 [2021-06-12 21:37:38,774 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 21:37:38,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:38,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,795 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 39 treesize of output 39 [2021-06-12 21:37:38,813 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 21:37:38,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,843 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 29 treesize of output 49 [2021-06-12 21:37:38,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:38,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,910 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 21:37:38,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-12 21:37:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:38,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653482716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:38,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:38,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:37:38,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47877859] [2021-06-12 21:37:38,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:37:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:37:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:37:38,968 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:42,034 INFO L93 Difference]: Finished difference Result 5143 states and 16713 transitions. [2021-06-12 21:37:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:37:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:37:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:42,041 INFO L225 Difference]: With dead ends: 5143 [2021-06-12 21:37:42,042 INFO L226 Difference]: Without dead ends: 5118 [2021-06-12 21:37:42,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2489.0ms TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:37:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-06-12 21:37:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 3590. [2021-06-12 21:37:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 3.3011981053218165) internal successors, (11848), 3589 states have internal predecessors, (11848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 11848 transitions. [2021-06-12 21:37:42,099 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 11848 transitions. Word has length 30 [2021-06-12 21:37:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:42,099 INFO L482 AbstractCegarLoop]: Abstraction has 3590 states and 11848 transitions. [2021-06-12 21:37:42,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 11848 transitions. [2021-06-12 21:37:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:42,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:42,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:42,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-12 21:37:42,304 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1964181417, now seen corresponding path program 37 times [2021-06-12 21:37:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:42,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617961704] [2021-06-12 21:37:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:42,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:42,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617961704] [2021-06-12 21:37:42,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617961704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:42,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713152083] [2021-06-12 21:37:42,557 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 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 21:37:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:37:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:42,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,721 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 21:37:42,736 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 21:37:42,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:42,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,754 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 21:37:42,770 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 21:37:42,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,800 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 21:37:42,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:42,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:42,854 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 21:37:42,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:28 [2021-06-12 21:37:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:42,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713152083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:42,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:42,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 21:37:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647863726] [2021-06-12 21:37:42,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:37:42,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:42,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:37:42,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:37:42,920 INFO L87 Difference]: Start difference. First operand 3590 states and 11848 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:44,943 INFO L93 Difference]: Finished difference Result 4897 states and 15932 transitions. [2021-06-12 21:37:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:37:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-06-12 21:37:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:44,962 INFO L225 Difference]: With dead ends: 4897 [2021-06-12 21:37:44,962 INFO L226 Difference]: Without dead ends: 4872 [2021-06-12 21:37:44,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1703.3ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:37:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-12 21:37:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3580. [2021-06-12 21:37:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-06-12 21:37:45,008 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-06-12 21:37:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:45,009 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-06-12 21:37:45,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 21:37:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-06-12 21:37:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:37:45,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:45,013 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 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 21:37:45,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-12 21:37:45,213 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -602707730, now seen corresponding path program 51 times [2021-06-12 21:37:45,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:45,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271553179] [2021-06-12 21:37:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:45,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271553179] [2021-06-12 21:37:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271553179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174820888] [2021-06-12 21:37:45,597 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 21:37:45,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:37:45,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:37:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:50,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:50,725 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 43 treesize of output 67 [2021-06-12 21:37:50,971 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 21:37:51,026 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-12 21:37:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:51,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:51,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:51,046 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 35 treesize of output 59 [2021-06-12 21:37:51,242 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 21:37:51,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:51,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:51,328 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 21:37:51,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 21:37:52,006 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-12 21:37:52,006 INFO L628 ElimStorePlain]: treesize reduction 1080, result has 44.8 percent of original size [2021-06-12 21:37:52,495 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 166 [2021-06-12 21:37:52,908 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 21:37:52,908 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:620 [2021-06-12 21:37:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174820888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:53,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:53,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:53,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273976691] [2021-06-12 21:37:53,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:53,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:53,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:53,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=711, Unknown=3, NotChecked=0, Total=812 [2021-06-12 21:37:53,136 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:53,079 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-12 21:39:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:39:53,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:53,281 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:811) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:725) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:364) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-12 21:39:53,284 INFO L168 Benchmark]: Toolchain (without parser) took 450113.64 ms. Allocated memory was 212.9 MB in the beginning and 653.3 MB in the end (delta: 440.4 MB). Free memory was 193.4 MB in the beginning and 249.8 MB in the end (delta: -56.4 MB). Peak memory consumption was 385.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:39:53,284 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 212.9 MB. Free memory is still 194.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:39:53,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.32 ms. Allocated memory is still 212.9 MB. Free memory was 193.3 MB in the beginning and 191.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:39:53,284 INFO L168 Benchmark]: Boogie Preprocessor took 14.51 ms. Allocated memory is still 212.9 MB. Free memory was 191.8 MB in the beginning and 190.9 MB in the end (delta: 926.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:39:53,284 INFO L168 Benchmark]: RCFGBuilder took 185.90 ms. Allocated memory is still 212.9 MB. Free memory was 190.7 MB in the beginning and 179.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 21:39:53,285 INFO L168 Benchmark]: TraceAbstraction took 449887.89 ms. Allocated memory was 212.9 MB in the beginning and 653.3 MB in the end (delta: 440.4 MB). Free memory was 178.6 MB in the beginning and 249.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 369.9 MB. Max. memory is 8.0 GB. [2021-06-12 21:39:53,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 212.9 MB. Free memory is still 194.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.32 ms. Allocated memory is still 212.9 MB. Free memory was 193.3 MB in the beginning and 191.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.51 ms. Allocated memory is still 212.9 MB. Free memory was 191.8 MB in the beginning and 190.9 MB in the end (delta: 926.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 185.90 ms. Allocated memory is still 212.9 MB. Free memory was 190.7 MB in the beginning and 179.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 449887.89 ms. Allocated memory was 212.9 MB in the beginning and 653.3 MB in the end (delta: 440.4 MB). Free memory was 178.6 MB in the beginning and 249.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 369.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...