/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:18:42,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:18:42,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:18:42,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:18:42,786 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 [2021-05-21 21:18:42,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:18:42,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:18:42,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:18:42,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:18:42,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:18:42,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:18:42,824 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:18:42,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:18:42,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:18:42,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:18:42,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:18:42,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:18:42,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:18:42,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:18:42,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:18:42,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:18:43,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:18:43,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:18:43,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:18:43,109 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:18:43,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:18:43,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-05-21 21:18:43,112 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-05-21 21:18:43,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:18:43,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:18:43,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:18:43,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:18:43,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:18:43,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:18:43,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:18:43,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:18:43,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:18:43,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/1) ... [2021-05-21 21:18:43,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:18:43,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:18:43,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:18:43,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:18:43,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (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 [2021-05-21 21:18:43,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:18:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:18:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:18:43,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:18:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:18:43,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:18:43,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:18:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:18:43,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:18:43,256 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:18:43,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:18:43,476 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:18:43,477 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:18:43 BoogieIcfgContainer [2021-05-21 21:18:43,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:18:43,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:18:43,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:18:43,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:18:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:18:43" (1/2) ... [2021-05-21 21:18:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221dba94 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:18:43, skipping insertion in model container [2021-05-21 21:18:43,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:18:43" (2/2) ... [2021-05-21 21:18:43,484 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-05-21 21:18:43,488 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:18:43,489 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:18:43,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:18:43,489 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:18:43,531 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-21 21:18:43,561 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 21:18:43,593 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:18:43,593 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:18:43,593 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:18:43,593 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:18:43,593 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:18:43,594 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:18:43,594 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:18:43,594 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:18:43,602 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-21 21:18:43,630 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 21:18:43,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:43,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:43,656 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-05-21 21:18:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:43,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263301065] [2021-05-21 21:18:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:43,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:43,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263301065] [2021-05-21 21:18:43,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263301065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:18:43,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:18:43,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:18:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675867755] [2021-05-21 21:18:43,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:18:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:18:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:18:43,857 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:43,916 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-05-21 21:18:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:18:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 21:18:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:43,930 INFO L225 Difference]: With dead ends: 43 [2021-05-21 21:18:43,931 INFO L226 Difference]: Without dead ends: 43 [2021-05-21 21:18:43,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:18:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-21 21:18:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-05-21 21:18:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-05-21 21:18:43,970 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-05-21 21:18:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:43,971 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-05-21 21:18:43,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-05-21 21:18:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:18:43,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:43,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:43,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:18:43,974 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-05-21 21:18:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:43,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387530717] [2021-05-21 21:18:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:18:44,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:44,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387530717] [2021-05-21 21:18:44,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387530717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:18:44,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:18:44,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:18:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232671247] [2021-05-21 21:18:44,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:18:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:18:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:18:44,032 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:44,064 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-05-21 21:18:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:18:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:18:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:44,066 INFO L225 Difference]: With dead ends: 50 [2021-05-21 21:18:44,067 INFO L226 Difference]: Without dead ends: 50 [2021-05-21 21:18:44,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:18:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-21 21:18:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-05-21 21:18:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-05-21 21:18:44,074 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-05-21 21:18:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:44,074 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-05-21 21:18:44,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-05-21 21:18:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:18:44,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:44,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:44,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:18:44,076 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-05-21 21:18:44,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:44,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246969987] [2021-05-21 21:18:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:44,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246969987] [2021-05-21 21:18:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246969987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813881688] [2021-05-21 21:18:44,218 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 [2021-05-21 21:18:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:18:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813881688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:18:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817934352] [2021-05-21 21:18:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:18:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:18:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:18:44,542 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:44,655 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-05-21 21:18:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:18:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:18:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:44,657 INFO L225 Difference]: With dead ends: 144 [2021-05-21 21:18:44,657 INFO L226 Difference]: Without dead ends: 113 [2021-05-21 21:18:44,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:18:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-21 21:18:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-05-21 21:18:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-05-21 21:18:44,665 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-05-21 21:18:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:44,665 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-05-21 21:18:44,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-05-21 21:18:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:18:44,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:44,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:44,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 21:18:44,892 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-05-21 21:18:44,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:44,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740994087] [2021-05-21 21:18:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:44,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:44,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740994087] [2021-05-21 21:18:44,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740994087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815900243] [2021-05-21 21:18:44,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:44,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:44,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:18:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:45,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815900243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:45,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:45,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 21:18:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588106859] [2021-05-21 21:18:45,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:18:45,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:18:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:18:45,232 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:45,573 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-05-21 21:18:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:18:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:18:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:45,576 INFO L225 Difference]: With dead ends: 167 [2021-05-21 21:18:45,576 INFO L226 Difference]: Without dead ends: 167 [2021-05-21 21:18:45,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:18:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-21 21:18:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-05-21 21:18:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-05-21 21:18:45,598 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-05-21 21:18:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:45,598 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-05-21 21:18:45,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-05-21 21:18:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:18:45,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:45,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:45,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:45,823 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-05-21 21:18:45,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:45,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415128872] [2021-05-21 21:18:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:45,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415128872] [2021-05-21 21:18:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415128872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339877098] [2021-05-21 21:18:45,905 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 [2021-05-21 21:18:45,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:18:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:18:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339877098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:46,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:46,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:18:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661022860] [2021-05-21 21:18:46,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:18:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:18:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:18:46,072 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:46,396 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-05-21 21:18:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:18:46,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:18:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:46,398 INFO L225 Difference]: With dead ends: 141 [2021-05-21 21:18:46,398 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 21:18:46,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:18:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 21:18:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-05-21 21:18:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-05-21 21:18:46,404 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-05-21 21:18:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:46,404 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-05-21 21:18:46,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-05-21 21:18:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:18:46,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:46,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:46,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:18:46,628 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-05-21 21:18:46,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:46,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121706092] [2021-05-21 21:18:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:46,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121706092] [2021-05-21 21:18:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121706092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141730420] [2021-05-21 21:18:46,846 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 [2021-05-21 21:18:46,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:18:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:47,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141730420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:47,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:47,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-21 21:18:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445170729] [2021-05-21 21:18:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:18:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:18:47,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:18:47,305 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:47,925 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-05-21 21:18:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:18:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-05-21 21:18:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:47,929 INFO L225 Difference]: With dead ends: 350 [2021-05-21 21:18:47,930 INFO L226 Difference]: Without dead ends: 293 [2021-05-21 21:18:47,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 658.3ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:18:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-21 21:18:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-05-21 21:18:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-05-21 21:18:47,948 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-05-21 21:18:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:47,948 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-05-21 21:18:47,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-05-21 21:18:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:18:47,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:47,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:48,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:48,179 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-05-21 21:18:48,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:48,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566514294] [2021-05-21 21:18:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:48,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:48,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566514294] [2021-05-21 21:18:48,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566514294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310753737] [2021-05-21 21:18:48,363 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 [2021-05-21 21:18:48,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:18:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:18:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:48,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310753737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:48,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:48,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-21 21:18:48,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876752519] [2021-05-21 21:18:48,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:18:48,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:48,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:18:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:18:48,789 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:49,552 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-05-21 21:18:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:18:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-05-21 21:18:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:49,555 INFO L225 Difference]: With dead ends: 326 [2021-05-21 21:18:49,555 INFO L226 Difference]: Without dead ends: 286 [2021-05-21 21:18:49,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 788.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:18:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-21 21:18:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-05-21 21:18:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-05-21 21:18:49,572 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-05-21 21:18:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-05-21 21:18:49,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-05-21 21:18:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:18:49,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:49,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:49,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:18:49,789 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-05-21 21:18:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:49,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770604041] [2021-05-21 21:18:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:49,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770604041] [2021-05-21 21:18:49,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770604041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262000467] [2021-05-21 21:18:49,959 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 [2021-05-21 21:18:49,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:18:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:49,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:18:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262000467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:50,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:50,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-21 21:18:50,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5407598] [2021-05-21 21:18:50,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:18:50,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:50,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:18:50,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:18:50,341 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:51,570 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-05-21 21:18:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:18:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-05-21 21:18:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:51,575 INFO L225 Difference]: With dead ends: 387 [2021-05-21 21:18:51,575 INFO L226 Difference]: Without dead ends: 341 [2021-05-21 21:18:51,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:18:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-21 21:18:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-05-21 21:18:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-05-21 21:18:51,582 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-05-21 21:18:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:51,582 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-05-21 21:18:51,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-21 21:18:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-05-21 21:18:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:18:51,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:51,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:51,797 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-05-21 21:18:51,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:51,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104576712] [2021-05-21 21:18:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:51,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104576712] [2021-05-21 21:18:51,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104576712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005108248] [2021-05-21 21:18:51,881 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 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 [2021-05-21 21:18:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:18:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:18:52,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005108248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:52,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:52,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 21:18:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128256994] [2021-05-21 21:18:52,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:18:52,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:18:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:18:52,109 INFO L87 Difference]: Start difference. First operand 124 states and 255 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) [2021-05-21 21:18:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:52,692 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-05-21 21:18:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:18:52,693 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 23 [2021-05-21 21:18:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:52,694 INFO L225 Difference]: With dead ends: 302 [2021-05-21 21:18:52,694 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 21:18:52,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:18:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 21:18:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-05-21 21:18:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-05-21 21:18:52,701 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-05-21 21:18:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:52,701 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-05-21 21:18:52,701 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) [2021-05-21 21:18:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-05-21 21:18:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:18:52,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:52,702 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:52,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:18:52,905 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-05-21 21:18:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:52,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437082664] [2021-05-21 21:18:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:52,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:52,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437082664] [2021-05-21 21:18:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437082664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:52,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754416020] [2021-05-21 21:18:52,984 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 [2021-05-21 21:18:53,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:53,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:18:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:53,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754416020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:53,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:53,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-21 21:18:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768451460] [2021-05-21 21:18:53,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:18:53,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:18:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:18:53,167 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:53,645 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-05-21 21:18:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:18:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:18:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:53,648 INFO L225 Difference]: With dead ends: 404 [2021-05-21 21:18:53,648 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 21:18:53,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:18:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 21:18:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-05-21 21:18:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-05-21 21:18:53,655 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-05-21 21:18:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:53,655 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-05-21 21:18:53,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-05-21 21:18:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:18:53,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:53,656 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 21:18:53,869 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-05-21 21:18:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573492333] [2021-05-21 21:18:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:53,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:53,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573492333] [2021-05-21 21:18:53,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573492333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:53,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855920333] [2021-05-21 21:18:53,922 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 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 [2021-05-21 21:18:53,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:18:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:18:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:54,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855920333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:54,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:54,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-21 21:18:54,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630465646] [2021-05-21 21:18:54,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:18:54,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:54,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:18:54,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:18:54,141 INFO L87 Difference]: Start difference. First operand 175 states and 383 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:18:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:54,787 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-05-21 21:18:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:18:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-05-21 21:18:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:54,789 INFO L225 Difference]: With dead ends: 308 [2021-05-21 21:18:54,789 INFO L226 Difference]: Without dead ends: 306 [2021-05-21 21:18:54,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:18:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-21 21:18:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-05-21 21:18:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-05-21 21:18:54,798 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-05-21 21:18:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:54,798 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-05-21 21:18:54,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:18:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-05-21 21:18:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:18:54,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:54,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:55,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:55,013 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-05-21 21:18:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:55,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167781547] [2021-05-21 21:18:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:55,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:55,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167781547] [2021-05-21 21:18:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167781547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:55,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908287116] [2021-05-21 21:18:55,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:55,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:18:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:55,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908287116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:55,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:55,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:18:55,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140638548] [2021-05-21 21:18:55,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:18:55,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:18:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:18:55,710 INFO L87 Difference]: Start difference. First operand 175 states and 382 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) [2021-05-21 21:18:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:56,691 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-05-21 21:18:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:18:56,691 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 27 [2021-05-21 21:18:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:56,696 INFO L225 Difference]: With dead ends: 609 [2021-05-21 21:18:56,696 INFO L226 Difference]: Without dead ends: 543 [2021-05-21 21:18:56,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1046.8ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:18:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-05-21 21:18:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-05-21 21:18:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-05-21 21:18:56,708 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-05-21 21:18:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:56,708 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-05-21 21:18:56,708 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) [2021-05-21 21:18:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-05-21 21:18:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:18:56,709 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:56,709 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:56,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 21:18:56,921 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-05-21 21:18:56,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:56,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490238877] [2021-05-21 21:18:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490238877] [2021-05-21 21:18:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490238877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674935437] [2021-05-21 21:18:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:57,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:18:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:18:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674935437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:57,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:18:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251798919] [2021-05-21 21:18:57,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:18:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:18:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:18:57,646 INFO L87 Difference]: Start difference. First operand 229 states and 506 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) [2021-05-21 21:18:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:58,705 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-05-21 21:18:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:18:58,705 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 27 [2021-05-21 21:18:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:58,707 INFO L225 Difference]: With dead ends: 588 [2021-05-21 21:18:58,707 INFO L226 Difference]: Without dead ends: 534 [2021-05-21 21:18:58,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1109.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:18:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-21 21:18:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-05-21 21:18:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-05-21 21:18:58,715 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-05-21 21:18:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:58,715 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-05-21 21:18:58,715 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) [2021-05-21 21:18:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-05-21 21:18:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:18:58,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:58,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:58,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-21 21:18:58,934 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-05-21 21:18:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:58,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534016198] [2021-05-21 21:18:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:59,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534016198] [2021-05-21 21:18:59,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534016198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828482873] [2021-05-21 21:18:59,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:59,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:18:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:59,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:18:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:59,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828482873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:59,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:59,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:18:59,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153232375] [2021-05-21 21:18:59,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:18:59,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:18:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:18:59,533 INFO L87 Difference]: Start difference. First operand 248 states and 546 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) [2021-05-21 21:19:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:00,772 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-05-21 21:19:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:19:00,773 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 27 [2021-05-21 21:19:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:00,775 INFO L225 Difference]: With dead ends: 592 [2021-05-21 21:19:00,775 INFO L226 Difference]: Without dead ends: 559 [2021-05-21 21:19:00,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:19:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-05-21 21:19:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-05-21 21:19:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-05-21 21:19:00,783 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-05-21 21:19:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:00,784 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-05-21 21:19:00,784 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) [2021-05-21 21:19:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-05-21 21:19:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:00,785 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:00,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:01,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:01,001 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-05-21 21:19:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:01,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463169524] [2021-05-21 21:19:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:01,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:01,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463169524] [2021-05-21 21:19:01,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463169524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:01,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428628365] [2021-05-21 21:19:01,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:19:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428628365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:01,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:01,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:19:01,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966345005] [2021-05-21 21:19:01,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:19:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:19:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:01,698 INFO L87 Difference]: Start difference. First operand 272 states and 598 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) [2021-05-21 21:19:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:03,119 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-05-21 21:19:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:03,120 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 27 [2021-05-21 21:19:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:03,122 INFO L225 Difference]: With dead ends: 679 [2021-05-21 21:19:03,122 INFO L226 Difference]: Without dead ends: 616 [2021-05-21 21:19:03,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:19:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-05-21 21:19:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-05-21 21:19:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-05-21 21:19:03,131 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-05-21 21:19:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:03,132 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-05-21 21:19:03,132 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) [2021-05-21 21:19:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-05-21 21:19:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:03,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:03,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:03,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-21 21:19:03,355 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-05-21 21:19:03,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:03,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072261471] [2021-05-21 21:19:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:03,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:03,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072261471] [2021-05-21 21:19:03,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072261471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:03,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379446990] [2021-05-21 21:19:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:03,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:03,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:03,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:19:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379446990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:03,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:03,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:19:03,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773369525] [2021-05-21 21:19:03,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:19:03,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:19:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:03,984 INFO L87 Difference]: Start difference. First operand 280 states and 614 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) [2021-05-21 21:19:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:05,758 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-05-21 21:19:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:19:05,759 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 27 [2021-05-21 21:19:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:05,761 INFO L225 Difference]: With dead ends: 744 [2021-05-21 21:19:05,762 INFO L226 Difference]: Without dead ends: 704 [2021-05-21 21:19:05,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1725.8ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:19:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-05-21 21:19:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-05-21 21:19:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-05-21 21:19:05,772 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-05-21 21:19:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:05,772 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-05-21 21:19:05,772 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) [2021-05-21 21:19:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-05-21 21:19:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:05,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:05,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:05,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:05,993 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-05-21 21:19:05,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:05,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771687593] [2021-05-21 21:19:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771687593] [2021-05-21 21:19:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771687593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534097708] [2021-05-21 21:19:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:06,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:19:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:06,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:19:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534097708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:06,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 21:19:06,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714210606] [2021-05-21 21:19:06,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:19:06,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:06,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:19:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:06,437 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-05-21 21:19:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:07,323 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-05-21 21:19:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:19:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-05-21 21:19:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:07,325 INFO L225 Difference]: With dead ends: 662 [2021-05-21 21:19:07,325 INFO L226 Difference]: Without dead ends: 662 [2021-05-21 21:19:07,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:19:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-21 21:19:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-05-21 21:19:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-05-21 21:19:07,335 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-05-21 21:19:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:07,335 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-05-21 21:19:07,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-05-21 21:19:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-05-21 21:19:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:07,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:07,336 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:07,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:07,541 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-05-21 21:19:07,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:07,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051598848] [2021-05-21 21:19:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:07,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051598848] [2021-05-21 21:19:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051598848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928232129] [2021-05-21 21:19:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:07,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:19:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928232129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:08,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:08,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-21 21:19:08,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598573132] [2021-05-21 21:19:08,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:19:08,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:19:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:08,297 INFO L87 Difference]: Start difference. First operand 340 states and 758 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) [2021-05-21 21:19:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:10,413 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-05-21 21:19:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 21:19:10,413 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 27 [2021-05-21 21:19:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:10,416 INFO L225 Difference]: With dead ends: 1105 [2021-05-21 21:19:10,416 INFO L226 Difference]: Without dead ends: 1038 [2021-05-21 21:19:10,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 2031.9ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:19:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-05-21 21:19:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-05-21 21:19:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-05-21 21:19:10,429 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-05-21 21:19:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:10,429 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-05-21 21:19:10,429 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) [2021-05-21 21:19:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-05-21 21:19:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:10,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:10,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:10,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:10,652 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-05-21 21:19:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487791873] [2021-05-21 21:19:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:10,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487791873] [2021-05-21 21:19:10,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487791873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938260433] [2021-05-21 21:19:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:10,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:19:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:19:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:11,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938260433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:11,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:11,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 21:19:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146006542] [2021-05-21 21:19:11,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:19:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:19:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:11,121 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-05-21 21:19:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:12,199 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-05-21 21:19:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-05-21 21:19:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:12,201 INFO L225 Difference]: With dead ends: 820 [2021-05-21 21:19:12,201 INFO L226 Difference]: Without dead ends: 793 [2021-05-21 21:19:12,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1078.5ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:19:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-05-21 21:19:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-05-21 21:19:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-05-21 21:19:12,211 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-05-21 21:19:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:12,211 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-05-21 21:19:12,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-05-21 21:19:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-05-21 21:19:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:19:12,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:12,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:12,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 21:19:12,435 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-05-21 21:19:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:12,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533027284] [2021-05-21 21:19:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:12,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533027284] [2021-05-21 21:19:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533027284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833176864] [2021-05-21 21:19:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:12,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:19:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:19:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833176864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:12,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:12,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-05-21 21:19:12,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057632143] [2021-05-21 21:19:12,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 21:19:12,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 21:19:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:19:12,746 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-21 21:19:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:13,407 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-05-21 21:19:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:13,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 [2021-05-21 21:19:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:13,409 INFO L225 Difference]: With dead ends: 790 [2021-05-21 21:19:13,409 INFO L226 Difference]: Without dead ends: 786 [2021-05-21 21:19:13,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:19:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-05-21 21:19:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-05-21 21:19:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-05-21 21:19:13,420 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-05-21 21:19:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:13,420 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-05-21 21:19:13,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-21 21:19:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-05-21 21:19:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:13,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:13,422 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:13,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 21:19:13,637 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-05-21 21:19:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:13,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348754625] [2021-05-21 21:19:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:13,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:13,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348754625] [2021-05-21 21:19:13,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348754625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:13,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241918163] [2021-05-21 21:19:13,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:19:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:14,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241918163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:14,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:19:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362770204] [2021-05-21 21:19:14,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:19:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:19:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:19:14,042 INFO L87 Difference]: Start difference. First operand 458 states and 1033 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) 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) [2021-05-21 21:19:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:14,907 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-05-21 21:19:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:19:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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 29 [2021-05-21 21:19:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:14,910 INFO L225 Difference]: With dead ends: 890 [2021-05-21 21:19:14,910 INFO L226 Difference]: Without dead ends: 890 [2021-05-21 21:19:14,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 829.5ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:19:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-05-21 21:19:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-05-21 21:19:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-05-21 21:19:14,921 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-05-21 21:19:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-05-21 21:19:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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) [2021-05-21 21:19:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-05-21 21:19:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:14,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:14,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:15,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:15,133 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-05-21 21:19:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:15,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089934021] [2021-05-21 21:19:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:15,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089934021] [2021-05-21 21:19:15,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089934021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177202137] [2021-05-21 21:19:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:15,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:19:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177202137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:15,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:15,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-05-21 21:19:15,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387787387] [2021-05-21 21:19:15,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:19:15,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:19:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:19:15,419 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-05-21 21:19:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:16,414 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-05-21 21:19:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:19:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 29 [2021-05-21 21:19:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:16,417 INFO L225 Difference]: With dead ends: 726 [2021-05-21 21:19:16,417 INFO L226 Difference]: Without dead ends: 722 [2021-05-21 21:19:16,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:19:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-21 21:19:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-05-21 21:19:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-05-21 21:19:16,427 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-05-21 21:19:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:16,427 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-05-21 21:19:16,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-05-21 21:19:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-05-21 21:19:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:16,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:16,428 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:16,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 21:19:16,650 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-05-21 21:19:16,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090267371] [2021-05-21 21:19:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:16,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090267371] [2021-05-21 21:19:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090267371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168505628] [2021-05-21 21:19:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:16,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:19:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:19:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:17,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168505628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:17,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:17,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-05-21 21:19:17,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153093119] [2021-05-21 21:19:17,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:19:17,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:19:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:19:17,251 INFO L87 Difference]: Start difference. First operand 458 states and 1030 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) [2021-05-21 21:19:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:19,030 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-05-21 21:19:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:19:19,030 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 29 [2021-05-21 21:19:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:19,033 INFO L225 Difference]: With dead ends: 705 [2021-05-21 21:19:19,033 INFO L226 Difference]: Without dead ends: 684 [2021-05-21 21:19:19,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1786.7ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:19:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-05-21 21:19:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-05-21 21:19:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-05-21 21:19:19,042 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-05-21 21:19:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:19,042 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-05-21 21:19:19,042 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) [2021-05-21 21:19:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-05-21 21:19:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:19,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:19,044 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:19,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:19,257 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-05-21 21:19:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:19,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043172213] [2021-05-21 21:19:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:19,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043172213] [2021-05-21 21:19:19,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043172213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070623468] [2021-05-21 21:19:19,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:19,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:19:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070623468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:20,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:20,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-05-21 21:19:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837943321] [2021-05-21 21:19:20,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:20,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:20,110 INFO L87 Difference]: Start difference. First operand 473 states and 1069 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) [2021-05-21 21:19:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:21,896 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-05-21 21:19:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:19:21,896 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 29 [2021-05-21 21:19:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:21,898 INFO L225 Difference]: With dead ends: 761 [2021-05-21 21:19:21,898 INFO L226 Difference]: Without dead ends: 749 [2021-05-21 21:19:21,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1825.9ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:19:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-05-21 21:19:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-05-21 21:19:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-05-21 21:19:21,913 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-05-21 21:19:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:21,913 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-05-21 21:19:21,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-05-21 21:19:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-05-21 21:19:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:19:21,914 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:21,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:22,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:22,136 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-05-21 21:19:22,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:22,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399775007] [2021-05-21 21:19:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:22,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399775007] [2021-05-21 21:19:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399775007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624778408] [2021-05-21 21:19:22,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:22,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:19:22,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:19:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:22,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624778408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:22,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:22,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-05-21 21:19:22,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160306004] [2021-05-21 21:19:22,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:19:22,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:22,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:19:22,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:19:22,763 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-05-21 21:19:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:24,467 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-05-21 21:19:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 21:19:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 29 [2021-05-21 21:19:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:24,470 INFO L225 Difference]: With dead ends: 1009 [2021-05-21 21:19:24,470 INFO L226 Difference]: Without dead ends: 975 [2021-05-21 21:19:24,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1617.5ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 21:19:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-05-21 21:19:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-05-21 21:19:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-05-21 21:19:24,481 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-05-21 21:19:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:24,481 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-05-21 21:19:24,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-05-21 21:19:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-05-21 21:19:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:24,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:24,483 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:24,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:24,697 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-05-21 21:19:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:24,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911838520] [2021-05-21 21:19:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:24,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:24,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911838520] [2021-05-21 21:19:24,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911838520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:24,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475488097] [2021-05-21 21:19:24,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:24,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:19:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:19:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475488097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:25,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:25,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691615200] [2021-05-21 21:19:25,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:25,436 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:26,683 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-05-21 21:19:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:19:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:26,686 INFO L225 Difference]: With dead ends: 1174 [2021-05-21 21:19:26,686 INFO L226 Difference]: Without dead ends: 1105 [2021-05-21 21:19:26,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1242.9ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:19:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-05-21 21:19:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-05-21 21:19:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-05-21 21:19:26,695 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-05-21 21:19:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:26,695 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-05-21 21:19:26,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-05-21 21:19:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:26,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:26,697 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:26,913 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-05-21 21:19:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811376670] [2021-05-21 21:19:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:27,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811376670] [2021-05-21 21:19:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811376670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192753119] [2021-05-21 21:19:27,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:27,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192753119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:27,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:27,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:27,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2346497] [2021-05-21 21:19:27,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:27,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:27,660 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:28,808 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-05-21 21:19:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:19:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:28,812 INFO L225 Difference]: With dead ends: 1108 [2021-05-21 21:19:28,812 INFO L226 Difference]: Without dead ends: 1051 [2021-05-21 21:19:28,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1239.1ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:19:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-05-21 21:19:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-05-21 21:19:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-05-21 21:19:28,823 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-05-21 21:19:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:28,824 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-05-21 21:19:28,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-05-21 21:19:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:28,825 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:28,825 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:29,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-21 21:19:29,041 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-05-21 21:19:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:29,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224150881] [2021-05-21 21:19:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:29,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:29,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224150881] [2021-05-21 21:19:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224150881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:29,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840639618] [2021-05-21 21:19:29,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:29,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840639618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:29,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:29,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:29,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377889112] [2021-05-21 21:19:29,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:29,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:29,900 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:31,517 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-05-21 21:19:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:19:31,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:31,520 INFO L225 Difference]: With dead ends: 1217 [2021-05-21 21:19:31,520 INFO L226 Difference]: Without dead ends: 1175 [2021-05-21 21:19:31,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1721.4ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:19:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-05-21 21:19:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-05-21 21:19:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-05-21 21:19:31,533 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-05-21 21:19:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:31,533 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-05-21 21:19:31,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-05-21 21:19:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:31,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:31,534 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:31,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:31,757 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-05-21 21:19:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:31,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409262514] [2021-05-21 21:19:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:31,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409262514] [2021-05-21 21:19:31,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409262514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473883020] [2021-05-21 21:19:31,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:32,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:19:32,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:32,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473883020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:32,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:32,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:32,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786832421] [2021-05-21 21:19:32,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:32,585 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:34,167 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-05-21 21:19:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:19:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:34,171 INFO L225 Difference]: With dead ends: 1268 [2021-05-21 21:19:34,171 INFO L226 Difference]: Without dead ends: 1199 [2021-05-21 21:19:34,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1637.6ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:19:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-05-21 21:19:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-05-21 21:19:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-05-21 21:19:34,181 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-05-21 21:19:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:34,181 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-05-21 21:19:34,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-05-21 21:19:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:34,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:34,182 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-05-21 21:19:34,404 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-05-21 21:19:34,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:34,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429821385] [2021-05-21 21:19:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:34,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:34,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429821385] [2021-05-21 21:19:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429821385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:34,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429961440] [2021-05-21 21:19:34,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:34,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:34,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429961440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:35,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:35,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:35,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467199651] [2021-05-21 21:19:35,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:35,119 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:36,997 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-05-21 21:19:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 21:19:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:37,001 INFO L225 Difference]: With dead ends: 1427 [2021-05-21 21:19:37,001 INFO L226 Difference]: Without dead ends: 1385 [2021-05-21 21:19:37,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1908.2ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 21:19:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-05-21 21:19:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-05-21 21:19:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-05-21 21:19:37,014 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-05-21 21:19:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:37,014 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-05-21 21:19:37,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-05-21 21:19:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:37,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:37,015 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:37,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:37,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-05-21 21:19:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040188394] [2021-05-21 21:19:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040188394] [2021-05-21 21:19:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040188394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979002106] [2021-05-21 21:19:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:37,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:19:37,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979002106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:37,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966387665] [2021-05-21 21:19:37,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:37,991 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:40,902 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-05-21 21:19:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 21:19:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:40,908 INFO L225 Difference]: With dead ends: 1966 [2021-05-21 21:19:40,908 INFO L226 Difference]: Without dead ends: 1908 [2021-05-21 21:19:40,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2797.2ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 21:19:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-05-21 21:19:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-05-21 21:19:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-05-21 21:19:40,926 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-05-21 21:19:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:40,926 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-05-21 21:19:40,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-05-21 21:19:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:40,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:40,927 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:41,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-21 21:19:41,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-05-21 21:19:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:41,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191909076] [2021-05-21 21:19:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:41,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191909076] [2021-05-21 21:19:41,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191909076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038847463] [2021-05-21 21:19:41,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:41,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:19:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:41,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 21:19:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038847463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:41,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-21 21:19:41,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636169355] [2021-05-21 21:19:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:19:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:19:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:19:41,777 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:43,253 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-05-21 21:19:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:19:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:43,257 INFO L225 Difference]: With dead ends: 1633 [2021-05-21 21:19:43,257 INFO L226 Difference]: Without dead ends: 1633 [2021-05-21 21:19:43,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1515.6ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:19:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-05-21 21:19:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-05-21 21:19:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-05-21 21:19:43,273 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-05-21 21:19:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:43,273 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-05-21 21:19:43,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-05-21 21:19:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:43,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:43,274 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:43,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:43,478 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-05-21 21:19:43,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:43,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721563292] [2021-05-21 21:19:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:43,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:43,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721563292] [2021-05-21 21:19:43,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721563292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:43,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899501788] [2021-05-21 21:19:43,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:43,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 21:19:43,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899501788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:44,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:44,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-21 21:19:44,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560357419] [2021-05-21 21:19:44,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:19:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:19:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:19:44,086 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:47,416 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-05-21 21:19:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:19:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:47,418 INFO L225 Difference]: With dead ends: 1582 [2021-05-21 21:19:47,418 INFO L226 Difference]: Without dead ends: 1525 [2021-05-21 21:19:47,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2971.1ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:19:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-05-21 21:19:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-05-21 21:19:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-05-21 21:19:47,433 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-05-21 21:19:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:47,433 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-05-21 21:19:47,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-05-21 21:19:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:47,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:47,434 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:47,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:47,649 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-05-21 21:19:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:47,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580510376] [2021-05-21 21:19:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580510376] [2021-05-21 21:19:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580510376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005874254] [2021-05-21 21:19:47,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:47,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:48,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005874254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:48,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:48,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:19:48,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601262542] [2021-05-21 21:19:48,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:19:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:19:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:19:48,499 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:51,938 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-05-21 21:19:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 21:19:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:51,941 INFO L225 Difference]: With dead ends: 1889 [2021-05-21 21:19:51,941 INFO L226 Difference]: Without dead ends: 1838 [2021-05-21 21:19:51,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3372.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:19:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-05-21 21:19:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-05-21 21:19:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-05-21 21:19:51,955 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-05-21 21:19:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:51,955 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-05-21 21:19:51,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-05-21 21:19:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:51,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:51,956 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:52,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-05-21 21:19:52,157 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-05-21 21:19:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:52,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740306800] [2021-05-21 21:19:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:52,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:52,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740306800] [2021-05-21 21:19:52,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740306800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:52,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754731580] [2021-05-21 21:19:52,317 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 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 [2021-05-21 21:19:52,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:19:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:19:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:52,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754731580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:52,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:52,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:19:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51272367] [2021-05-21 21:19:52,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:19:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:19:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:19:52,745 INFO L87 Difference]: Start difference. First operand 929 states and 2150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:54,090 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-05-21 21:19:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:19:54,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:54,092 INFO L225 Difference]: With dead ends: 1635 [2021-05-21 21:19:54,092 INFO L226 Difference]: Without dead ends: 1635 [2021-05-21 21:19:54,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1344.3ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:19:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-05-21 21:19:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-05-21 21:19:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-05-21 21:19:54,105 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-05-21 21:19:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:54,105 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-05-21 21:19:54,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-05-21 21:19:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:54,106 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:54,106 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:54,315 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-05-21 21:19:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072252360] [2021-05-21 21:19:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:54,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:54,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072252360] [2021-05-21 21:19:54,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072252360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:54,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943396220] [2021-05-21 21:19:54,519 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 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 [2021-05-21 21:19:54,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:54,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:19:54,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:55,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943396220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:55,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:55,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-21 21:19:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008420328] [2021-05-21 21:19:55,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:19:55,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:19:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:19:55,028 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:58,215 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-05-21 21:19:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:19:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:19:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:58,219 INFO L225 Difference]: With dead ends: 2696 [2021-05-21 21:19:58,219 INFO L226 Difference]: Without dead ends: 2642 [2021-05-21 21:19:58,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2893.2ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 21:19:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-21 21:19:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-05-21 21:19:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-05-21 21:19:58,239 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-05-21 21:19:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:58,239 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-05-21 21:19:58,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-05-21 21:19:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:19:58,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:58,240 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:58,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-21 21:19:58,441 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-05-21 21:19:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:58,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250926625] [2021-05-21 21:19:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:58,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250926625] [2021-05-21 21:19:58,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250926625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406137424] [2021-05-21 21:19:58,590 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 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 [2021-05-21 21:19:58,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:19:58,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:19:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:19:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406137424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:58,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:58,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-21 21:19:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641806759] [2021-05-21 21:19:58,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:19:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:58,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:19:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:19:58,806 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-05-21 21:20:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:00,842 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-05-21 21:20:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 21:20:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 31 [2021-05-21 21:20:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:00,845 INFO L225 Difference]: With dead ends: 2304 [2021-05-21 21:20:00,845 INFO L226 Difference]: Without dead ends: 2208 [2021-05-21 21:20:00,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1709.3ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 21:20:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-21 21:20:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-05-21 21:20:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-05-21 21:20:00,870 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-05-21 21:20:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:00,870 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-05-21 21:20:00,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-05-21 21:20:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-05-21 21:20:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:20:00,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:00,872 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:01,089 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-05-21 21:20:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222573430] [2021-05-21 21:20:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222573430] [2021-05-21 21:20:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222573430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227578117] [2021-05-21 21:20:01,295 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 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 [2021-05-21 21:20:01,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:20:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:20:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227578117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:01,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:01,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-21 21:20:01,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444280335] [2021-05-21 21:20:01,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:20:01,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:20:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:20:01,834 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:04,173 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-05-21 21:20:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 21:20:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:20:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:04,179 INFO L225 Difference]: With dead ends: 2856 [2021-05-21 21:20:04,179 INFO L226 Difference]: Without dead ends: 2771 [2021-05-21 21:20:04,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2310.9ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:20:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-05-21 21:20:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-05-21 21:20:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-05-21 21:20:04,209 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-05-21 21:20:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:04,209 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-05-21 21:20:04,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-05-21 21:20:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:20:04,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:04,212 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:04,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-05-21 21:20:04,425 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-05-21 21:20:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441570228] [2021-05-21 21:20:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:04,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441570228] [2021-05-21 21:20:04,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441570228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:04,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072330734] [2021-05-21 21:20:04,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:20:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:20:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:05,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072330734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:05,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:05,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:20:05,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906742121] [2021-05-21 21:20:05,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:20:05,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:20:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:20:05,372 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:09,347 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-05-21 21:20:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:20:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:20:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:09,356 INFO L225 Difference]: With dead ends: 3900 [2021-05-21 21:20:09,356 INFO L226 Difference]: Without dead ends: 3784 [2021-05-21 21:20:09,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3742.5ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 21:20:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-05-21 21:20:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-05-21 21:20:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-05-21 21:20:09,391 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-05-21 21:20:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:09,391 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-05-21 21:20:09,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-05-21 21:20:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:20:09,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:09,394 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:09,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-05-21 21:20:09,609 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-05-21 21:20:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733457003] [2021-05-21 21:20:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:09,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733457003] [2021-05-21 21:20:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733457003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714902489] [2021-05-21 21:20:09,837 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 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 [2021-05-21 21:20:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:20:09,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:20:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:10,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714902489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:10,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:10,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:20:10,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176287791] [2021-05-21 21:20:10,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:20:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:20:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:20:10,385 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:13,837 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-05-21 21:20:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 21:20:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:20:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:13,841 INFO L225 Difference]: With dead ends: 3505 [2021-05-21 21:20:13,841 INFO L226 Difference]: Without dead ends: 3426 [2021-05-21 21:20:13,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 3239.0ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:20:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-05-21 21:20:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-05-21 21:20:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-05-21 21:20:13,865 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-05-21 21:20:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:13,865 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-05-21 21:20:13,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-05-21 21:20:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:20:13,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:13,868 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:14,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-21 21:20:14,089 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-05-21 21:20:14,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:14,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602477747] [2021-05-21 21:20:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:20:14,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602477747] [2021-05-21 21:20:14,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602477747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112407667] [2021-05-21 21:20:14,267 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 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 [2021-05-21 21:20:14,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:20:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:20:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:14,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112407667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:14,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:20:14,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438845663] [2021-05-21 21:20:14,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:20:14,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:14,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:20:14,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:20:14,768 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:16,458 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-05-21 21:20:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:20:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:20:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:16,460 INFO L225 Difference]: With dead ends: 3076 [2021-05-21 21:20:16,461 INFO L226 Difference]: Without dead ends: 3052 [2021-05-21 21:20:16,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1724.5ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 21:20:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-05-21 21:20:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-05-21 21:20:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-05-21 21:20:16,482 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-05-21 21:20:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:16,482 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-05-21 21:20:16,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-05-21 21:20:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:20:16,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:16,484 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:16,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-21 21:20:16,685 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-05-21 21:20:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904541637] [2021-05-21 21:20:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:16,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904541637] [2021-05-21 21:20:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904541637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214448866] [2021-05-21 21:20:16,775 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 [2021-05-21 21:20:16,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:16,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:20:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214448866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:17,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:17,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-21 21:20:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709161786] [2021-05-21 21:20:17,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:20:17,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:17,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:20:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:20:17,125 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) 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) [2021-05-21 21:20:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:18,183 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-05-21 21:20:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:20:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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 31 [2021-05-21 21:20:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:18,186 INFO L225 Difference]: With dead ends: 2592 [2021-05-21 21:20:18,186 INFO L226 Difference]: Without dead ends: 2588 [2021-05-21 21:20:18,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 971.2ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:20:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-21 21:20:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-05-21 21:20:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-05-21 21:20:18,215 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-05-21 21:20:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:18,216 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-05-21 21:20:18,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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) [2021-05-21 21:20:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-05-21 21:20:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:18,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:18,218 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:18,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:18,433 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-05-21 21:20:18,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:18,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166721138] [2021-05-21 21:20:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:18,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:18,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166721138] [2021-05-21 21:20:18,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166721138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:18,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124655246] [2021-05-21 21:20:18,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:20:18,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:20:18,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 21:20:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124655246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:18,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:18,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:20:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088033710] [2021-05-21 21:20:18,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:20:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:20:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:20:18,914 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:20,072 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-05-21 21:20:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:20:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:20,076 INFO L225 Difference]: With dead ends: 3118 [2021-05-21 21:20:20,076 INFO L226 Difference]: Without dead ends: 3109 [2021-05-21 21:20:20,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 21:20:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-05-21 21:20:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-05-21 21:20:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-05-21 21:20:20,099 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-05-21 21:20:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:20,099 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-05-21 21:20:20,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-05-21 21:20:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:20,101 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:20,101 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:20,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-05-21 21:20:20,321 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-05-21 21:20:20,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:20,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000878936] [2021-05-21 21:20:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:20,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000878936] [2021-05-21 21:20:20,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000878936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107499300] [2021-05-21 21:20:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:20,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:20:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:20:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:20,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107499300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:20,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:20,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-05-21 21:20:20,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874642892] [2021-05-21 21:20:20,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:20:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:20:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:20:20,757 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:22,342 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-05-21 21:20:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:20:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:22,344 INFO L225 Difference]: With dead ends: 1686 [2021-05-21 21:20:22,344 INFO L226 Difference]: Without dead ends: 1682 [2021-05-21 21:20:22,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1541.7ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 21:20:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-05-21 21:20:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-05-21 21:20:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-05-21 21:20:22,354 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-05-21 21:20:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:22,354 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-05-21 21:20:22,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-05-21 21:20:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:22,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:22,355 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:22,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:22,556 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-05-21 21:20:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:22,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449765273] [2021-05-21 21:20:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:22,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449765273] [2021-05-21 21:20:22,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449765273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:22,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050657150] [2021-05-21 21:20:22,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:20:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050657150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779779119] [2021-05-21 21:20:23,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:23,488 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:25,628 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-05-21 21:20:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:20:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:25,629 INFO L225 Difference]: With dead ends: 1262 [2021-05-21 21:20:25,629 INFO L226 Difference]: Without dead ends: 1211 [2021-05-21 21:20:25,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2297.2ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:20:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-05-21 21:20:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-05-21 21:20:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-05-21 21:20:25,638 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-05-21 21:20:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:25,638 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-05-21 21:20:25,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-05-21 21:20:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:25,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:25,639 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:25,853 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-05-21 21:20:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:25,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137309260] [2021-05-21 21:20:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:26,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137309260] [2021-05-21 21:20:26,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137309260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394128426] [2021-05-21 21:20:26,088 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 [2021-05-21 21:20:26,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:20:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:20:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394128426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:26,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:26,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509837735] [2021-05-21 21:20:26,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:26,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:26,736 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:29,909 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-05-21 21:20:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 21:20:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:29,911 INFO L225 Difference]: With dead ends: 1563 [2021-05-21 21:20:29,911 INFO L226 Difference]: Without dead ends: 1473 [2021-05-21 21:20:29,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2913.7ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:20:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-05-21 21:20:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-05-21 21:20:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-05-21 21:20:29,921 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-05-21 21:20:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:29,921 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-05-21 21:20:29,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-05-21 21:20:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:29,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:29,922 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:30,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-21 21:20:30,123 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-05-21 21:20:30,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:30,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251351252] [2021-05-21 21:20:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251351252] [2021-05-21 21:20:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251351252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368872585] [2021-05-21 21:20:30,333 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 [2021-05-21 21:20:30,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:20:30,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:20:30,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:30,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368872585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:30,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:30,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:30,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664631209] [2021-05-21 21:20:30,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:30,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:30,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:30,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:30,844 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:34,191 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-05-21 21:20:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-21 21:20:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:34,193 INFO L225 Difference]: With dead ends: 1689 [2021-05-21 21:20:34,193 INFO L226 Difference]: Without dead ends: 1674 [2021-05-21 21:20:34,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2935.9ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 21:20:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-05-21 21:20:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-05-21 21:20:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-05-21 21:20:34,205 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-05-21 21:20:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:34,205 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-05-21 21:20:34,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-05-21 21:20:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:34,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:34,207 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:34,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:34,408 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-05-21 21:20:34,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:34,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294462805] [2021-05-21 21:20:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:34,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:34,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294462805] [2021-05-21 21:20:34,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294462805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:34,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303814600] [2021-05-21 21:20:34,628 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 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 [2021-05-21 21:20:34,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 21:20:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303814600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:35,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:35,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-21 21:20:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068474728] [2021-05-21 21:20:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:35,218 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:37,408 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-05-21 21:20:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 21:20:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:37,411 INFO L225 Difference]: With dead ends: 1528 [2021-05-21 21:20:37,411 INFO L226 Difference]: Without dead ends: 1519 [2021-05-21 21:20:37,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2007.7ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 21:20:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-05-21 21:20:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-05-21 21:20:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-05-21 21:20:37,422 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-05-21 21:20:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:37,422 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-05-21 21:20:37,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-05-21 21:20:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:37,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:37,424 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:37,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:37,640 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-05-21 21:20:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:37,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144951715] [2021-05-21 21:20:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:37,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144951715] [2021-05-21 21:20:37,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144951715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642118264] [2021-05-21 21:20:37,851 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 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 [2021-05-21 21:20:37,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:20:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:20:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:38,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642118264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:38,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:38,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:38,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597393304] [2021-05-21 21:20:38,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:38,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:38,371 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:42,943 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-05-21 21:20:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 21:20:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:42,945 INFO L225 Difference]: With dead ends: 1919 [2021-05-21 21:20:42,945 INFO L226 Difference]: Without dead ends: 1913 [2021-05-21 21:20:42,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3934.6ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 21:20:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-05-21 21:20:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-05-21 21:20:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-05-21 21:20:42,959 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-05-21 21:20:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:42,960 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-05-21 21:20:42,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-05-21 21:20:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:42,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:42,961 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:43,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:43,162 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-05-21 21:20:43,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:43,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975368730] [2021-05-21 21:20:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:43,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975368730] [2021-05-21 21:20:43,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975368730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368835667] [2021-05-21 21:20:43,394 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 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 [2021-05-21 21:20:43,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:20:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:20:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:44,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368835667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:44,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:44,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113769539] [2021-05-21 21:20:44,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:44,155 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:46,618 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-05-21 21:20:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:20:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:46,620 INFO L225 Difference]: With dead ends: 1626 [2021-05-21 21:20:46,620 INFO L226 Difference]: Without dead ends: 1611 [2021-05-21 21:20:46,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2468.2ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:20:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-05-21 21:20:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-05-21 21:20:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-05-21 21:20:46,632 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-05-21 21:20:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:46,632 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-05-21 21:20:46,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-05-21 21:20:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:46,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:46,634 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:46,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:46,834 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-05-21 21:20:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:46,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909201669] [2021-05-21 21:20:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:47,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909201669] [2021-05-21 21:20:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909201669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671413520] [2021-05-21 21:20:47,095 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 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 [2021-05-21 21:20:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:20:47,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:47,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671413520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:47,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:47,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-05-21 21:20:47,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869381248] [2021-05-21 21:20:47,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:20:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:20:47,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:20:47,426 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:49,201 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-05-21 21:20:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:20:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:49,204 INFO L225 Difference]: With dead ends: 1934 [2021-05-21 21:20:49,204 INFO L226 Difference]: Without dead ends: 1918 [2021-05-21 21:20:49,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1648.9ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:20:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-05-21 21:20:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-05-21 21:20:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-05-21 21:20:49,216 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-05-21 21:20:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:49,217 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-05-21 21:20:49,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-05-21 21:20:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:49,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:49,219 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:49,433 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-05-21 21:20:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634929443] [2021-05-21 21:20:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:49,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:49,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634929443] [2021-05-21 21:20:49,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634929443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:49,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059595170] [2021-05-21 21:20:49,689 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 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 [2021-05-21 21:20:49,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:20:49,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:49,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:20:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059595170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:50,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:50,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-21 21:20:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154308079] [2021-05-21 21:20:50,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:20:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:20:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:20:50,560 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:52,738 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-05-21 21:20:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:20:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:52,740 INFO L225 Difference]: With dead ends: 1543 [2021-05-21 21:20:52,740 INFO L226 Difference]: Without dead ends: 1491 [2021-05-21 21:20:52,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2326.1ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 21:20:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-05-21 21:20:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-05-21 21:20:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-05-21 21:20:52,751 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-05-21 21:20:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:52,751 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-05-21 21:20:52,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-05-21 21:20:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:52,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:52,752 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:52,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-05-21 21:20:52,953 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-05-21 21:20:52,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:52,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209407499] [2021-05-21 21:20:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:53,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209407499] [2021-05-21 21:20:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209407499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853089692] [2021-05-21 21:20:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:20:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:20:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:53,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853089692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:53,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:53,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:53,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597842861] [2021-05-21 21:20:53,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:53,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:53,899 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:57,964 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-05-21 21:20:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:20:57,964 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:20:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:57,966 INFO L225 Difference]: With dead ends: 1720 [2021-05-21 21:20:57,966 INFO L226 Difference]: Without dead ends: 1654 [2021-05-21 21:20:57,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3823.2ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:20:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-05-21 21:20:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-05-21 21:20:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-05-21 21:20:57,979 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-05-21 21:20:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:57,979 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-05-21 21:20:57,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-05-21 21:20:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:20:57,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:57,981 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:58,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-21 21:20:58,181 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-05-21 21:20:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:58,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649302184] [2021-05-21 21:20:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:58,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:58,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649302184] [2021-05-21 21:20:58,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649302184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:58,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487967042] [2021-05-21 21:20:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:58,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:20:58,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:59,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487967042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:20:59,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846607993] [2021-05-21 21:20:59,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:20:59,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:20:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:20:59,107 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:04,963 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-05-21 21:21:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:21:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:04,965 INFO L225 Difference]: With dead ends: 1758 [2021-05-21 21:21:04,965 INFO L226 Difference]: Without dead ends: 1734 [2021-05-21 21:21:04,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 5483.7ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-05-21 21:21:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-21 21:21:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-05-21 21:21:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-05-21 21:21:04,980 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-05-21 21:21:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:04,980 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-05-21 21:21:04,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-05-21 21:21:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:04,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:04,982 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:05,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-05-21 21:21:05,205 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-05-21 21:21:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:05,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302461165] [2021-05-21 21:21:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:05,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:05,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302461165] [2021-05-21 21:21:05,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302461165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:05,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738126725] [2021-05-21 21:21:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:05,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:21:05,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:05,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:21:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:06,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738126725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:06,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:06,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-21 21:21:06,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366533857] [2021-05-21 21:21:06,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:06,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:06,207 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:09,004 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-05-21 21:21:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:21:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:09,006 INFO L225 Difference]: With dead ends: 2073 [2021-05-21 21:21:09,006 INFO L226 Difference]: Without dead ends: 2070 [2021-05-21 21:21:09,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2911.5ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:21:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-21 21:21:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-05-21 21:21:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-05-21 21:21:09,021 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-05-21 21:21:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:09,021 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-05-21 21:21:09,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-05-21 21:21:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:09,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:09,023 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:09,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-21 21:21:09,226 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-05-21 21:21:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403055828] [2021-05-21 21:21:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:09,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403055828] [2021-05-21 21:21:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403055828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784896997] [2021-05-21 21:21:09,561 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 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 [2021-05-21 21:21:09,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:21:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:21:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:10,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784896997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:10,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:10,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 21:21:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356254424] [2021-05-21 21:21:10,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:21:10,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:21:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:21:10,111 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:12,762 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-05-21 21:21:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:21:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:12,764 INFO L225 Difference]: With dead ends: 2367 [2021-05-21 21:21:12,764 INFO L226 Difference]: Without dead ends: 2333 [2021-05-21 21:21:12,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2584.7ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:21:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-05-21 21:21:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-05-21 21:21:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-05-21 21:21:12,783 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-05-21 21:21:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:12,783 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-05-21 21:21:12,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-05-21 21:21:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:12,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:12,786 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:12,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-05-21 21:21:12,986 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-05-21 21:21:12,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:12,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191562964] [2021-05-21 21:21:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:13,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:13,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191562964] [2021-05-21 21:21:13,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191562964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:13,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285627133] [2021-05-21 21:21:13,270 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 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 [2021-05-21 21:21:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:21:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285627133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:13,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:13,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 21:21:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137331082] [2021-05-21 21:21:13,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:21:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:21:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:21:13,838 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:17,171 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-05-21 21:21:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:21:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:17,174 INFO L225 Difference]: With dead ends: 2788 [2021-05-21 21:21:17,174 INFO L226 Difference]: Without dead ends: 2754 [2021-05-21 21:21:17,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3112.6ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 21:21:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-05-21 21:21:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-05-21 21:21:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-05-21 21:21:17,194 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-05-21 21:21:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:17,194 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-05-21 21:21:17,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-05-21 21:21:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:17,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:17,196 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:17,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:17,397 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-05-21 21:21:17,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:17,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690199111] [2021-05-21 21:21:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:17,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:17,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690199111] [2021-05-21 21:21:17,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690199111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:17,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12209517] [2021-05-21 21:21:17,640 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 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 [2021-05-21 21:21:17,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:21:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:17,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:18,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12209517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:18,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:18,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-21 21:21:18,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296073373] [2021-05-21 21:21:18,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:18,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:18,383 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:20,497 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-05-21 21:21:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:21:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:20,499 INFO L225 Difference]: With dead ends: 2147 [2021-05-21 21:21:20,499 INFO L226 Difference]: Without dead ends: 2126 [2021-05-21 21:21:20,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1985.7ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:21:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-05-21 21:21:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-05-21 21:21:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-05-21 21:21:20,516 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-05-21 21:21:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:20,516 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-05-21 21:21:20,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-05-21 21:21:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:20,518 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:20,518 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:20,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:20,720 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:20,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-05-21 21:21:20,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:20,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265994478] [2021-05-21 21:21:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:20,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:20,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265994478] [2021-05-21 21:21:20,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265994478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:20,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504660185] [2021-05-21 21:21:20,981 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 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 [2021-05-21 21:21:21,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:21:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:21:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504660185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:21,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:21,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-21 21:21:21,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884024640] [2021-05-21 21:21:21,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:21,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:21,631 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:24,151 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-05-21 21:21:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:21:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:24,154 INFO L225 Difference]: With dead ends: 2353 [2021-05-21 21:21:24,154 INFO L226 Difference]: Without dead ends: 2311 [2021-05-21 21:21:24,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2566.3ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:21:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-05-21 21:21:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-05-21 21:21:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-05-21 21:21:24,179 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-05-21 21:21:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:24,180 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-05-21 21:21:24,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-05-21 21:21:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:24,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:24,182 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:24,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:24,409 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-05-21 21:21:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:24,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53037181] [2021-05-21 21:21:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:24,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:24,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53037181] [2021-05-21 21:21:24,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53037181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:24,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381392943] [2021-05-21 21:21:24,726 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 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 [2021-05-21 21:21:24,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:21:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:21:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:25,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381392943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:25,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:25,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 21:21:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799812843] [2021-05-21 21:21:25,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:21:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:21:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:21:25,276 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:28,047 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-05-21 21:21:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:21:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:28,050 INFO L225 Difference]: With dead ends: 3037 [2021-05-21 21:21:28,050 INFO L226 Difference]: Without dead ends: 2970 [2021-05-21 21:21:28,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2734.6ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:21:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-05-21 21:21:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-05-21 21:21:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-05-21 21:21:28,071 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-05-21 21:21:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:28,071 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-05-21 21:21:28,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-05-21 21:21:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:28,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:28,073 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:28,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-05-21 21:21:28,274 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-05-21 21:21:28,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:28,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321129482] [2021-05-21 21:21:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:28,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:28,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321129482] [2021-05-21 21:21:28,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321129482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:28,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700388985] [2021-05-21 21:21:28,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:21:28,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:21:28,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:21:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:29,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700388985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:29,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:29,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-21 21:21:29,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361509159] [2021-05-21 21:21:29,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:21:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:21:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:21:29,081 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:31,822 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-05-21 21:21:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:21:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:31,826 INFO L225 Difference]: With dead ends: 3720 [2021-05-21 21:21:31,826 INFO L226 Difference]: Without dead ends: 3639 [2021-05-21 21:21:31,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2609.4ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:21:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-05-21 21:21:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-05-21 21:21:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-05-21 21:21:31,851 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-05-21 21:21:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:31,851 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-05-21 21:21:31,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-05-21 21:21:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:21:31,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:31,853 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:32,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:32,054 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-05-21 21:21:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:32,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131048191] [2021-05-21 21:21:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:32,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:32,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131048191] [2021-05-21 21:21:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131048191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:32,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180068827] [2021-05-21 21:21:32,306 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 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 [2021-05-21 21:21:32,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:21:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 21:21:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:32,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180068827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:32,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:32,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-21 21:21:32,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345398762] [2021-05-21 21:21:32,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:21:32,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:21:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:21:32,902 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:36,099 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-05-21 21:21:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:21:36,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:21:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:36,103 INFO L225 Difference]: With dead ends: 3836 [2021-05-21 21:21:36,104 INFO L226 Difference]: Without dead ends: 3773 [2021-05-21 21:21:36,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 3062.4ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 21:21:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-05-21 21:21:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-05-21 21:21:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-05-21 21:21:36,142 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-05-21 21:21:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-05-21 21:21:36,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-05-21 21:21:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:36,144 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:36,144 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:36,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-05-21 21:21:36,345 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-05-21 21:21:36,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:36,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154144227] [2021-05-21 21:21:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:36,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:36,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154144227] [2021-05-21 21:21:36,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154144227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:36,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696762313] [2021-05-21 21:21:36,554 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:37,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696762313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:37,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:37,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:37,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92922491] [2021-05-21 21:21:37,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:37,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:37,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:37,214 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:38,805 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-05-21 21:21:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 21:21:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:38,808 INFO L225 Difference]: With dead ends: 3299 [2021-05-21 21:21:38,808 INFO L226 Difference]: Without dead ends: 3247 [2021-05-21 21:21:38,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1675.1ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 21:21:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-05-21 21:21:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-05-21 21:21:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-05-21 21:21:38,843 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-05-21 21:21:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:38,843 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-05-21 21:21:38,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-05-21 21:21:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:38,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:38,846 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:39,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-05-21 21:21:39,046 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-05-21 21:21:39,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:39,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203320197] [2021-05-21 21:21:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:39,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:39,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203320197] [2021-05-21 21:21:39,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203320197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:39,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285950172] [2021-05-21 21:21:39,281 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 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 [2021-05-21 21:21:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:21:39,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:39,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285950172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:39,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:39,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:39,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066838865] [2021-05-21 21:21:39,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:39,826 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:41,386 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-05-21 21:21:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:21:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:41,389 INFO L225 Difference]: With dead ends: 3241 [2021-05-21 21:21:41,389 INFO L226 Difference]: Without dead ends: 3193 [2021-05-21 21:21:41,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1538.8ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 21:21:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-05-21 21:21:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-05-21 21:21:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-05-21 21:21:41,423 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-05-21 21:21:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:41,424 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-05-21 21:21:41,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-05-21 21:21:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:41,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:41,426 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:41,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:41,627 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-05-21 21:21:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:41,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918242937] [2021-05-21 21:21:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:41,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918242937] [2021-05-21 21:21:41,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918242937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013579455] [2021-05-21 21:21:41,840 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 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 [2021-05-21 21:21:41,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:21:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:42,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013579455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:42,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:42,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:42,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582585520] [2021-05-21 21:21:42,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:42,408 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:44,470 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-05-21 21:21:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:21:44,470 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:44,473 INFO L225 Difference]: With dead ends: 3451 [2021-05-21 21:21:44,473 INFO L226 Difference]: Without dead ends: 3409 [2021-05-21 21:21:44,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2127.7ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 21:21:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-05-21 21:21:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-05-21 21:21:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-05-21 21:21:44,509 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-05-21 21:21:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:44,509 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-05-21 21:21:44,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-05-21 21:21:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:44,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:44,513 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:44,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:44,729 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-05-21 21:21:44,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:44,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493881478] [2021-05-21 21:21:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:44,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:44,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493881478] [2021-05-21 21:21:44,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493881478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:44,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774617918] [2021-05-21 21:21:44,965 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 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 [2021-05-21 21:21:44,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:21:44,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:45,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774617918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:45,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:45,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:45,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044354461] [2021-05-21 21:21:45,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:45,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:45,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:45,576 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:47,410 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-05-21 21:21:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:21:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:47,413 INFO L225 Difference]: With dead ends: 3327 [2021-05-21 21:21:47,413 INFO L226 Difference]: Without dead ends: 3273 [2021-05-21 21:21:47,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1950.4ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:21:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-05-21 21:21:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-05-21 21:21:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-05-21 21:21:47,440 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-05-21 21:21:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-05-21 21:21:47,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-05-21 21:21:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:47,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:47,443 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:47,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-05-21 21:21:47,643 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-05-21 21:21:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076382698] [2021-05-21 21:21:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:47,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:47,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076382698] [2021-05-21 21:21:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076382698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908170486] [2021-05-21 21:21:47,861 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 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 [2021-05-21 21:21:47,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:21:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908170486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:48,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:48,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23394004] [2021-05-21 21:21:48,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:48,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:48,542 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:50,987 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-05-21 21:21:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:21:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:50,995 INFO L225 Difference]: With dead ends: 3537 [2021-05-21 21:21:50,995 INFO L226 Difference]: Without dead ends: 3495 [2021-05-21 21:21:50,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2521.5ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 21:21:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-05-21 21:21:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-05-21 21:21:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-05-21 21:21:51,020 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-05-21 21:21:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:51,020 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-05-21 21:21:51,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-05-21 21:21:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:51,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:51,022 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:51,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-05-21 21:21:51,222 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-05-21 21:21:51,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:51,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060387412] [2021-05-21 21:21:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:51,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060387412] [2021-05-21 21:21:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060387412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764328023] [2021-05-21 21:21:51,430 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 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 [2021-05-21 21:21:51,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:21:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:52,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764328023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:52,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:52,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232331785] [2021-05-21 21:21:52,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:52,076 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:55,389 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-05-21 21:21:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 21:21:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:21:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:55,392 INFO L225 Difference]: With dead ends: 3760 [2021-05-21 21:21:55,392 INFO L226 Difference]: Without dead ends: 3718 [2021-05-21 21:21:55,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3146.4ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 21:21:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-05-21 21:21:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-05-21 21:21:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-05-21 21:21:55,435 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-05-21 21:21:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:55,436 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-05-21 21:21:55,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-05-21 21:21:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:21:55,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:55,438 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:55,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:55,662 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-05-21 21:21:55,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:55,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800217499] [2021-05-21 21:21:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:55,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:55,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800217499] [2021-05-21 21:21:55,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800217499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:55,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204568381] [2021-05-21 21:21:55,881 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 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 [2021-05-21 21:21:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:55,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:21:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:56,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204568381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:56,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:56,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:21:56,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666831453] [2021-05-21 21:21:56,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:21:56,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:56,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:21:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:21:56,572 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:00,455 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-05-21 21:22:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-21 21:22:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:00,459 INFO L225 Difference]: With dead ends: 4092 [2021-05-21 21:22:00,459 INFO L226 Difference]: Without dead ends: 4052 [2021-05-21 21:22:00,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3685.8ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 21:22:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-05-21 21:22:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-05-21 21:22:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-05-21 21:22:00,488 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-05-21 21:22:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:00,488 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-05-21 21:22:00,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-05-21 21:22:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:00,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:00,490 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:00,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:00,691 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-05-21 21:22:00,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:00,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191091806] [2021-05-21 21:22:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:00,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191091806] [2021-05-21 21:22:00,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191091806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779107293] [2021-05-21 21:22:00,896 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 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 [2021-05-21 21:22:00,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:00,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:00,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:01,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779107293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:01,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:01,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:22:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337619907] [2021-05-21 21:22:01,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:22:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:22:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:22:01,520 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:05,494 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-05-21 21:22:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:22:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:05,498 INFO L225 Difference]: With dead ends: 4809 [2021-05-21 21:22:05,498 INFO L226 Difference]: Without dead ends: 4769 [2021-05-21 21:22:05,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3500.3ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 21:22:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-05-21 21:22:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-05-21 21:22:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-05-21 21:22:05,530 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-05-21 21:22:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:05,530 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-05-21 21:22:05,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-05-21 21:22:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:05,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:05,532 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:05,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:05,733 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-05-21 21:22:05,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:05,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828337769] [2021-05-21 21:22:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:05,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828337769] [2021-05-21 21:22:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828337769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645990696] [2021-05-21 21:22:05,896 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 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 [2021-05-21 21:22:05,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:22:05,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:22:05,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:22:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645990696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:06,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:06,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:22:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673539021] [2021-05-21 21:22:06,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:22:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:22:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:22:06,325 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:07,835 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-05-21 21:22:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:22:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:07,839 INFO L225 Difference]: With dead ends: 3689 [2021-05-21 21:22:07,839 INFO L226 Difference]: Without dead ends: 3687 [2021-05-21 21:22:07,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1381.0ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 21:22:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-05-21 21:22:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-05-21 21:22:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-05-21 21:22:07,868 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-05-21 21:22:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:07,868 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-05-21 21:22:07,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-05-21 21:22:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:07,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:07,871 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:08,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:08,071 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:08,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-05-21 21:22:08,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:08,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249377910] [2021-05-21 21:22:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:08,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249377910] [2021-05-21 21:22:08,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249377910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409369093] [2021-05-21 21:22:08,359 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 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 [2021-05-21 21:22:08,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409369093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:08,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:08,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:22:08,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777336167] [2021-05-21 21:22:08,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:22:08,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:22:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:22:08,981 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:12,585 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-05-21 21:22:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 21:22:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:12,589 INFO L225 Difference]: With dead ends: 3976 [2021-05-21 21:22:12,589 INFO L226 Difference]: Without dead ends: 3916 [2021-05-21 21:22:12,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3420.1ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 21:22:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-05-21 21:22:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-05-21 21:22:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-05-21 21:22:12,618 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-05-21 21:22:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:12,618 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-05-21 21:22:12,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-05-21 21:22:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:12,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:12,620 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:12,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-05-21 21:22:12,821 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-05-21 21:22:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:12,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743964949] [2021-05-21 21:22:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:13,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743964949] [2021-05-21 21:22:13,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743964949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484997266] [2021-05-21 21:22:13,062 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 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 [2021-05-21 21:22:13,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:22:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484997266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:13,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:13,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:22:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240262287] [2021-05-21 21:22:13,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:22:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:22:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:22:13,692 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:17,115 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-05-21 21:22:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:22:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:17,119 INFO L225 Difference]: With dead ends: 4131 [2021-05-21 21:22:17,119 INFO L226 Difference]: Without dead ends: 4089 [2021-05-21 21:22:17,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3285.2ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:22:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-05-21 21:22:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-05-21 21:22:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-05-21 21:22:17,147 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-05-21 21:22:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:17,147 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-05-21 21:22:17,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-05-21 21:22:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:17,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:17,150 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:17,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:17,350 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-05-21 21:22:17,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:17,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079425054] [2021-05-21 21:22:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:17,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079425054] [2021-05-21 21:22:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079425054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152754382] [2021-05-21 21:22:17,534 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 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 [2021-05-21 21:22:17,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:22:17,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:22:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:17,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152754382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:17,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:17,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:22:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300874233] [2021-05-21 21:22:17,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:22:17,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:22:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:22:17,968 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:19,775 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-05-21 21:22:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:22:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:19,778 INFO L225 Difference]: With dead ends: 3500 [2021-05-21 21:22:19,778 INFO L226 Difference]: Without dead ends: 3500 [2021-05-21 21:22:19,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1768.2ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:22:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-05-21 21:22:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-05-21 21:22:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-05-21 21:22:19,807 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-05-21 21:22:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:19,807 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-05-21 21:22:19,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-05-21 21:22:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:19,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:19,809 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-05-21 21:22:20,013 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-05-21 21:22:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380438068] [2021-05-21 21:22:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:20,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380438068] [2021-05-21 21:22:20,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380438068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:20,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227327056] [2021-05-21 21:22:20,228 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 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 [2021-05-21 21:22:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:22:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:20,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227327056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:20,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:20,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:22:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703028703] [2021-05-21 21:22:20,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:22:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:22:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:22:20,687 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:22,726 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-05-21 21:22:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:22:22,726 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:22,729 INFO L225 Difference]: With dead ends: 3661 [2021-05-21 21:22:22,729 INFO L226 Difference]: Without dead ends: 3661 [2021-05-21 21:22:22,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1982.0ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:22:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-05-21 21:22:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-05-21 21:22:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-05-21 21:22:22,757 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-05-21 21:22:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:22,757 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-05-21 21:22:22,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-05-21 21:22:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:22,759 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:22,759 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:22,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:22,960 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-05-21 21:22:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:22,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376853984] [2021-05-21 21:22:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:23,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:23,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376853984] [2021-05-21 21:22:23,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376853984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:23,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531806801] [2021-05-21 21:22:23,141 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 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 [2021-05-21 21:22:23,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:22:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:23,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531806801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:23,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:23,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:22:23,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140685189] [2021-05-21 21:22:23,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:22:23,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:23,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:22:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:22:23,588 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:25,477 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-05-21 21:22:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 21:22:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:25,481 INFO L225 Difference]: With dead ends: 4400 [2021-05-21 21:22:25,481 INFO L226 Difference]: Without dead ends: 4400 [2021-05-21 21:22:25,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1826.8ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:22:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-05-21 21:22:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-05-21 21:22:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-05-21 21:22:25,512 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-05-21 21:22:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:25,512 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-05-21 21:22:25,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-05-21 21:22:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:25,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:25,514 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:25,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-05-21 21:22:25,715 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-05-21 21:22:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:25,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033418767] [2021-05-21 21:22:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:25,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033418767] [2021-05-21 21:22:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033418767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609405391] [2021-05-21 21:22:25,975 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 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 [2021-05-21 21:22:25,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:22:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:26,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609405391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:26,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:26,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:22:26,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341571590] [2021-05-21 21:22:26,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:22:26,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:22:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:22:26,573 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:29,642 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-05-21 21:22:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:22:29,642 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:29,646 INFO L225 Difference]: With dead ends: 4002 [2021-05-21 21:22:29,646 INFO L226 Difference]: Without dead ends: 3948 [2021-05-21 21:22:29,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2934.2ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 21:22:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-05-21 21:22:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-05-21 21:22:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-05-21 21:22:29,675 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-05-21 21:22:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:29,675 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-05-21 21:22:29,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-05-21 21:22:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:29,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:29,677 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:29,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:29,878 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:29,878 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-05-21 21:22:29,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:29,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067036283] [2021-05-21 21:22:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:30,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:30,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067036283] [2021-05-21 21:22:30,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067036283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:30,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415382379] [2021-05-21 21:22:30,125 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 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 [2021-05-21 21:22:30,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415382379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:30,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:30,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:22:30,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298619789] [2021-05-21 21:22:30,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:22:30,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:22:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:22:30,724 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:33,420 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-05-21 21:22:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 21:22:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:33,424 INFO L225 Difference]: With dead ends: 3842 [2021-05-21 21:22:33,424 INFO L226 Difference]: Without dead ends: 3770 [2021-05-21 21:22:33,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2693.2ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 21:22:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-05-21 21:22:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-05-21 21:22:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-05-21 21:22:33,453 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-05-21 21:22:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:33,453 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-05-21 21:22:33,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-05-21 21:22:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:33,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:33,455 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:33,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:33,656 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:33,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-05-21 21:22:33,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:33,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983104128] [2021-05-21 21:22:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:33,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983104128] [2021-05-21 21:22:33,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983104128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592345990] [2021-05-21 21:22:33,820 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 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 [2021-05-21 21:22:33,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:22:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:22:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:34,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592345990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:34,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:34,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:22:34,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872461950] [2021-05-21 21:22:34,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:22:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:22:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:22:34,270 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:36,063 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-05-21 21:22:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:22:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:36,069 INFO L225 Difference]: With dead ends: 5084 [2021-05-21 21:22:36,069 INFO L226 Difference]: Without dead ends: 5084 [2021-05-21 21:22:36,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1699.2ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:22:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-05-21 21:22:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-05-21 21:22:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-05-21 21:22:36,106 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-05-21 21:22:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:36,106 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-05-21 21:22:36,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-05-21 21:22:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:36,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:36,109 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:36,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-05-21 21:22:36,309 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-05-21 21:22:36,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:36,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513706418] [2021-05-21 21:22:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:22:36,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513706418] [2021-05-21 21:22:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513706418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661451223] [2021-05-21 21:22:36,466 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 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 [2021-05-21 21:22:36,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:22:36,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:22:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:22:36,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661451223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:36,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:36,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-05-21 21:22:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973476150] [2021-05-21 21:22:36,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:22:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:22:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:22:36,687 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:37,765 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-05-21 21:22:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:22:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:37,770 INFO L225 Difference]: With dead ends: 4189 [2021-05-21 21:22:37,770 INFO L226 Difference]: Without dead ends: 4153 [2021-05-21 21:22:37,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 943.0ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:22:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-05-21 21:22:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-05-21 21:22:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-05-21 21:22:37,809 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-05-21 21:22:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:37,809 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-05-21 21:22:37,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-05-21 21:22:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:37,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:37,813 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:38,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-05-21 21:22:38,027 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-05-21 21:22:38,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:38,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522476724] [2021-05-21 21:22:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:38,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522476724] [2021-05-21 21:22:38,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522476724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900137603] [2021-05-21 21:22:38,313 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 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 [2021-05-21 21:22:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900137603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:39,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:39,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:22:39,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824824809] [2021-05-21 21:22:39,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:22:39,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:22:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:22:39,023 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:42,717 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-05-21 21:22:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 21:22:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:42,721 INFO L225 Difference]: With dead ends: 4270 [2021-05-21 21:22:42,722 INFO L226 Difference]: Without dead ends: 4222 [2021-05-21 21:22:42,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3687.5ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 21:22:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-05-21 21:22:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-05-21 21:22:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-05-21 21:22:42,750 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-05-21 21:22:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:42,750 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-05-21 21:22:42,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-05-21 21:22:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:42,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:42,753 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:42,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:42,969 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-05-21 21:22:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:42,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835046602] [2021-05-21 21:22:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:22:43,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835046602] [2021-05-21 21:22:43,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835046602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332375028] [2021-05-21 21:22:43,189 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 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 [2021-05-21 21:22:43,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:43,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332375028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:43,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:43,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:22:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841497556] [2021-05-21 21:22:43,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:22:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:22:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:22:43,788 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:46,740 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-05-21 21:22:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:22:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:46,745 INFO L225 Difference]: With dead ends: 5077 [2021-05-21 21:22:46,745 INFO L226 Difference]: Without dead ends: 4993 [2021-05-21 21:22:46,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2883.0ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 21:22:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-05-21 21:22:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-05-21 21:22:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-05-21 21:22:46,780 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-05-21 21:22:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:46,780 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-05-21 21:22:46,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-05-21 21:22:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:46,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:46,782 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:46,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-05-21 21:22:46,983 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-05-21 21:22:46,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:46,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977139321] [2021-05-21 21:22:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977139321] [2021-05-21 21:22:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977139321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138854027] [2021-05-21 21:22:47,176 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 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 [2021-05-21 21:22:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:22:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138854027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:47,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:47,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:22:47,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137722322] [2021-05-21 21:22:47,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:22:47,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:22:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:22:47,843 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:51,386 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-05-21 21:22:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 21:22:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:51,390 INFO L225 Difference]: With dead ends: 5205 [2021-05-21 21:22:51,391 INFO L226 Difference]: Without dead ends: 5157 [2021-05-21 21:22:51,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3325.7ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:22:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-05-21 21:22:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-05-21 21:22:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-05-21 21:22:51,437 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-05-21 21:22:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:51,437 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-05-21 21:22:51,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-05-21 21:22:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:51,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:51,441 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:51,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-05-21 21:22:51,657 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-05-21 21:22:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:51,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486426043] [2021-05-21 21:22:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:51,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486426043] [2021-05-21 21:22:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486426043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282544150] [2021-05-21 21:22:51,954 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 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 [2021-05-21 21:22:51,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:22:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:52,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282544150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:52,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:52,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:22:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197552854] [2021-05-21 21:22:52,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:22:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:22:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:22:52,617 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:57,320 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-05-21 21:22:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:22:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:22:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:57,324 INFO L225 Difference]: With dead ends: 4625 [2021-05-21 21:22:57,324 INFO L226 Difference]: Without dead ends: 4559 [2021-05-21 21:22:57,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4500.1ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:22:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-05-21 21:22:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-05-21 21:22:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-05-21 21:22:57,360 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-05-21 21:22:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:57,360 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-05-21 21:22:57,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-05-21 21:22:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:22:57,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:57,362 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:57,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:57,563 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-05-21 21:22:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:57,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304367699] [2021-05-21 21:22:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:57,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:57,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304367699] [2021-05-21 21:22:57,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304367699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:57,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505481947] [2021-05-21 21:22:57,892 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 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 [2021-05-21 21:22:57,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:22:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:22:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505481947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:58,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:58,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:22:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049527089] [2021-05-21 21:22:58,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:22:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:22:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:22:58,504 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:02,510 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-05-21 21:23:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 21:23:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:02,514 INFO L225 Difference]: With dead ends: 4367 [2021-05-21 21:23:02,514 INFO L226 Difference]: Without dead ends: 4331 [2021-05-21 21:23:02,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3925.3ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 21:23:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-05-21 21:23:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-05-21 21:23:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-05-21 21:23:02,549 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-05-21 21:23:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:02,549 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-05-21 21:23:02,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-05-21 21:23:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:02,552 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:02,552 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:02,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:02,753 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-05-21 21:23:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:02,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435870392] [2021-05-21 21:23:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:03,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435870392] [2021-05-21 21:23:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435870392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837962676] [2021-05-21 21:23:03,021 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 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 [2021-05-21 21:23:03,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:23:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:23:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:03,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837962676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:03,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:03,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:23:03,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552951298] [2021-05-21 21:23:03,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:23:03,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:03,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:23:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:23:03,669 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:09,118 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-05-21 21:23:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-21 21:23:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:09,123 INFO L225 Difference]: With dead ends: 4790 [2021-05-21 21:23:09,123 INFO L226 Difference]: Without dead ends: 4748 [2021-05-21 21:23:09,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 5189.2ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-05-21 21:23:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-05-21 21:23:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-05-21 21:23:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-05-21 21:23:09,160 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-05-21 21:23:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:09,160 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-05-21 21:23:09,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-05-21 21:23:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:09,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:09,163 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:09,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-05-21 21:23:09,363 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-05-21 21:23:09,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:09,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116780531] [2021-05-21 21:23:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:09,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:09,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116780531] [2021-05-21 21:23:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116780531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:09,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506547210] [2021-05-21 21:23:09,564 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 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 [2021-05-21 21:23:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:23:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:10,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506547210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:10,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:10,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:23:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762076810] [2021-05-21 21:23:10,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:23:10,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:23:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:23:10,024 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:12,106 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-05-21 21:23:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:23:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:12,110 INFO L225 Difference]: With dead ends: 3894 [2021-05-21 21:23:12,110 INFO L226 Difference]: Without dead ends: 3894 [2021-05-21 21:23:12,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1967.4ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:23:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-05-21 21:23:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-05-21 21:23:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-05-21 21:23:12,140 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-05-21 21:23:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-05-21 21:23:12,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-05-21 21:23:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:12,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:12,143 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:12,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-05-21 21:23:12,344 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-05-21 21:23:12,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:12,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697818307] [2021-05-21 21:23:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:12,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697818307] [2021-05-21 21:23:12,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697818307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671119107] [2021-05-21 21:23:12,534 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 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 [2021-05-21 21:23:12,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:12,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:23:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:12,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671119107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:12,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:12,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:23:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316954062] [2021-05-21 21:23:12,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:23:12,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:23:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:23:12,981 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:14,969 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-05-21 21:23:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:23:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:14,973 INFO L225 Difference]: With dead ends: 4657 [2021-05-21 21:23:14,973 INFO L226 Difference]: Without dead ends: 4654 [2021-05-21 21:23:14,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1853.6ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:23:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-05-21 21:23:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-05-21 21:23:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-05-21 21:23:15,005 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-05-21 21:23:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:15,005 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-05-21 21:23:15,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-05-21 21:23:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:15,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:15,008 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:15,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-05-21 21:23:15,213 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-05-21 21:23:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:15,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670149484] [2021-05-21 21:23:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:15,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670149484] [2021-05-21 21:23:15,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670149484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558282942] [2021-05-21 21:23:15,360 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 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 [2021-05-21 21:23:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:23:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:23:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:15,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558282942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:15,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:15,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:23:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380207680] [2021-05-21 21:23:15,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:23:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:23:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:23:15,839 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:17,526 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-05-21 21:23:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:23:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:17,532 INFO L225 Difference]: With dead ends: 5710 [2021-05-21 21:23:17,532 INFO L226 Difference]: Without dead ends: 5686 [2021-05-21 21:23:17,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1518.6ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 21:23:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-05-21 21:23:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-05-21 21:23:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-05-21 21:23:17,582 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-05-21 21:23:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:17,582 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-05-21 21:23:17,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-05-21 21:23:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:17,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:17,585 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:17,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-05-21 21:23:17,786 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-05-21 21:23:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290762390] [2021-05-21 21:23:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290762390] [2021-05-21 21:23:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290762390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695982862] [2021-05-21 21:23:18,115 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 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 [2021-05-21 21:23:18,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:23:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:18,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695982862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:18,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:18,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:23:18,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591369342] [2021-05-21 21:23:18,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:23:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:23:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:23:18,808 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:22,921 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-05-21 21:23:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-21 21:23:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:22,927 INFO L225 Difference]: With dead ends: 7108 [2021-05-21 21:23:22,927 INFO L226 Difference]: Without dead ends: 7017 [2021-05-21 21:23:22,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3822.5ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-05-21 21:23:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-05-21 21:23:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-05-21 21:23:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-05-21 21:23:22,982 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-05-21 21:23:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:22,982 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-05-21 21:23:22,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-05-21 21:23:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:22,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:22,985 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:23,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:23,186 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-05-21 21:23:23,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:23,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527263089] [2021-05-21 21:23:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527263089] [2021-05-21 21:23:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527263089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550407155] [2021-05-21 21:23:23,409 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:23,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:23:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:23:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550407155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:23,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:23,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-05-21 21:23:23,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552832841] [2021-05-21 21:23:23,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:23:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:23:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:23:23,796 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:28,256 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-05-21 21:23:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-21 21:23:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:28,262 INFO L225 Difference]: With dead ends: 6487 [2021-05-21 21:23:28,262 INFO L226 Difference]: Without dead ends: 6433 [2021-05-21 21:23:28,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3848.9ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 21:23:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-05-21 21:23:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-05-21 21:23:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-05-21 21:23:28,315 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-05-21 21:23:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:28,315 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-05-21 21:23:28,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-05-21 21:23:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:28,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:28,320 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:28,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:28,520 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-05-21 21:23:28,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523646953] [2021-05-21 21:23:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:28,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:28,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523646953] [2021-05-21 21:23:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523646953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:28,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403675863] [2021-05-21 21:23:28,653 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:28,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:23:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:23:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:29,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403675863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:29,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:29,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:23:29,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257982934] [2021-05-21 21:23:29,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:23:29,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:23:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:23:29,104 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:30,488 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-05-21 21:23:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:23:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:30,496 INFO L225 Difference]: With dead ends: 6393 [2021-05-21 21:23:30,497 INFO L226 Difference]: Without dead ends: 6357 [2021-05-21 21:23:30,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1314.7ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:23:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-05-21 21:23:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-05-21 21:23:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-05-21 21:23:30,604 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-05-21 21:23:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:30,604 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-05-21 21:23:30,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-05-21 21:23:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:30,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:30,608 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:30,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-05-21 21:23:30,808 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-05-21 21:23:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:30,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000197596] [2021-05-21 21:23:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:30,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:30,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000197596] [2021-05-21 21:23:30,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000197596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:30,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604203036] [2021-05-21 21:23:30,965 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 21:23:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604203036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:31,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-21 21:23:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053860947] [2021-05-21 21:23:31,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:23:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:23:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:23:31,589 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:32,959 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-05-21 21:23:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:23:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:32,965 INFO L225 Difference]: With dead ends: 5425 [2021-05-21 21:23:32,965 INFO L226 Difference]: Without dead ends: 5407 [2021-05-21 21:23:32,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1488.0ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 21:23:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-05-21 21:23:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-05-21 21:23:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-05-21 21:23:33,009 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-05-21 21:23:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,009 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-05-21 21:23:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-05-21 21:23:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:33,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,014 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:33,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:33,214 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-05-21 21:23:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559038672] [2021-05-21 21:23:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559038672] [2021-05-21 21:23:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559038672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360991943] [2021-05-21 21:23:33,337 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:33,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:23:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360991943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:33,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:33,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-21 21:23:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446291373] [2021-05-21 21:23:33,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:23:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:23:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:23:33,770 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:34,745 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-05-21 21:23:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:23:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:34,749 INFO L225 Difference]: With dead ends: 4658 [2021-05-21 21:23:34,750 INFO L226 Difference]: Without dead ends: 4654 [2021-05-21 21:23:34,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1029.3ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:23:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-05-21 21:23:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-05-21 21:23:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-05-21 21:23:34,791 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-05-21 21:23:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:34,791 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-05-21 21:23:34,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-05-21 21:23:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:34,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:34,795 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:34,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-05-21 21:23:34,995 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-05-21 21:23:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:34,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663181189] [2021-05-21 21:23:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:35,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:35,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663181189] [2021-05-21 21:23:35,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663181189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114741785] [2021-05-21 21:23:35,282 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:35,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:23:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:23:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:35,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114741785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:35,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:23:35,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999657439] [2021-05-21 21:23:35,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:23:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:23:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:23:35,996 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:41,980 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-05-21 21:23:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-21 21:23:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:41,987 INFO L225 Difference]: With dead ends: 7630 [2021-05-21 21:23:41,987 INFO L226 Difference]: Without dead ends: 7551 [2021-05-21 21:23:41,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 5387.0ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-05-21 21:23:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-05-21 21:23:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-05-21 21:23:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-05-21 21:23:42,044 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-05-21 21:23:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:42,044 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-05-21 21:23:42,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-05-21 21:23:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:42,048 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:42,048 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:42,248 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-05-21 21:23:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416377768] [2021-05-21 21:23:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:42,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:42,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416377768] [2021-05-21 21:23:42,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416377768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:42,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363840462] [2021-05-21 21:23:42,509 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:42,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:42,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:23:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:43,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363840462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:43,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:43,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-21 21:23:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869986042] [2021-05-21 21:23:43,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:23:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:23:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:23:43,160 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:48,202 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-05-21 21:23:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-21 21:23:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:48,209 INFO L225 Difference]: With dead ends: 7197 [2021-05-21 21:23:48,209 INFO L226 Difference]: Without dead ends: 7141 [2021-05-21 21:23:48,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4660.6ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-05-21 21:23:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-05-21 21:23:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-05-21 21:23:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-05-21 21:23:48,271 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-05-21 21:23:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-05-21 21:23:48,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-05-21 21:23:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:48,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:48,275 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:48,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:48,475 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-05-21 21:23:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:48,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830250462] [2021-05-21 21:23:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:48,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830250462] [2021-05-21 21:23:48,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830250462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:48,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843766696] [2021-05-21 21:23:48,706 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:48,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:23:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:23:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:49,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843766696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:49,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:49,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:23:49,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454717712] [2021-05-21 21:23:49,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:23:49,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:23:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:23:49,226 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:51,392 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-05-21 21:23:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 21:23:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:51,399 INFO L225 Difference]: With dead ends: 6702 [2021-05-21 21:23:51,399 INFO L226 Difference]: Without dead ends: 6678 [2021-05-21 21:23:51,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2184.5ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 21:23:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-05-21 21:23:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-05-21 21:23:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-05-21 21:23:51,448 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-05-21 21:23:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:51,448 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-05-21 21:23:51,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-05-21 21:23:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:51,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:51,451 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:51,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:51,652 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-05-21 21:23:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:51,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223060656] [2021-05-21 21:23:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:51,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:51,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223060656] [2021-05-21 21:23:51,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223060656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:51,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847170194] [2021-05-21 21:23:51,868 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:51,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:23:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:23:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:52,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847170194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:52,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:52,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-21 21:23:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382662416] [2021-05-21 21:23:52,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:23:52,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:23:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:23:52,508 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:55,700 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-05-21 21:23:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:23:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:55,706 INFO L225 Difference]: With dead ends: 5512 [2021-05-21 21:23:55,706 INFO L226 Difference]: Without dead ends: 5461 [2021-05-21 21:23:55,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 3166.5ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 21:23:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-05-21 21:23:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-05-21 21:23:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-05-21 21:23:55,750 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-05-21 21:23:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:55,750 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-05-21 21:23:55,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-05-21 21:23:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:23:55,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:55,753 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:55,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-05-21 21:23:55,953 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-05-21 21:23:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661721111] [2021-05-21 21:23:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:56,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:56,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661721111] [2021-05-21 21:23:56,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661721111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:56,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817375895] [2021-05-21 21:23:56,086 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 21:23:56,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817375895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:56,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:56,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-21 21:23:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359874806] [2021-05-21 21:23:56,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:23:56,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:23:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:23:56,565 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:58,090 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-05-21 21:23:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:23:58,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:23:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:58,094 INFO L225 Difference]: With dead ends: 4687 [2021-05-21 21:23:58,094 INFO L226 Difference]: Without dead ends: 4675 [2021-05-21 21:23:58,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1406.6ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:23:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-05-21 21:23:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-05-21 21:23:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-05-21 21:23:58,132 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-05-21 21:23:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:58,132 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-05-21 21:23:58,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-05-21 21:23:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:23:58,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:58,135 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:58,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-05-21 21:23:58,336 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-05-21 21:23:58,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:58,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486711048] [2021-05-21 21:23:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:58,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486711048] [2021-05-21 21:23:58,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486711048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061511748] [2021-05-21 21:23:58,449 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:58,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:23:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:58,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061511748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:58,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:58,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-21 21:23:58,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067914239] [2021-05-21 21:23:58,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:23:58,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:58,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:23:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:23:58,733 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:00,176 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-05-21 21:24:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:24:00,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:00,181 INFO L225 Difference]: With dead ends: 5434 [2021-05-21 21:24:00,181 INFO L226 Difference]: Without dead ends: 5434 [2021-05-21 21:24:00,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1302.7ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:24:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-05-21 21:24:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-05-21 21:24:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-05-21 21:24:00,225 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-05-21 21:24:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:00,225 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-05-21 21:24:00,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-05-21 21:24:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:00,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:00,229 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:00,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:00,429 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-05-21 21:24:00,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:00,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572489138] [2021-05-21 21:24:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:00,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572489138] [2021-05-21 21:24:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572489138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520559310] [2021-05-21 21:24:00,491 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:00,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:24:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:24:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520559310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-05-21 21:24:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427378882] [2021-05-21 21:24:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:24:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:24:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:24:00,799 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:03,051 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-05-21 21:24:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-21 21:24:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:03,056 INFO L225 Difference]: With dead ends: 5175 [2021-05-21 21:24:03,056 INFO L226 Difference]: Without dead ends: 5171 [2021-05-21 21:24:03,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 2094.6ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:24:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-05-21 21:24:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-05-21 21:24:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-05-21 21:24:03,104 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-05-21 21:24:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:03,104 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-05-21 21:24:03,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-05-21 21:24:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:03,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:03,107 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:03,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:03,308 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-05-21 21:24:03,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:03,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108639808] [2021-05-21 21:24:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:03,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:03,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108639808] [2021-05-21 21:24:03,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108639808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:03,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540133052] [2021-05-21 21:24:03,782 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:03,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:24:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:03,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-21 21:24:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540133052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:04,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:04,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-05-21 21:24:04,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883912670] [2021-05-21 21:24:04,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:24:04,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:24:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:24:04,621 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:06,194 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-05-21 21:24:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:24:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:06,199 INFO L225 Difference]: With dead ends: 5204 [2021-05-21 21:24:06,199 INFO L226 Difference]: Without dead ends: 5150 [2021-05-21 21:24:06,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2011.4ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:24:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-05-21 21:24:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-05-21 21:24:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-05-21 21:24:06,246 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-05-21 21:24:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-05-21 21:24:06,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-05-21 21:24:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:06,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:06,251 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:06,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:06,452 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-05-21 21:24:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:06,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347765917] [2021-05-21 21:24:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:06,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:06,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347765917] [2021-05-21 21:24:06,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347765917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:06,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541616703] [2021-05-21 21:24:06,714 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:06,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:24:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:06,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:24:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:07,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541616703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:07,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:07,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-05-21 21:24:07,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119539303] [2021-05-21 21:24:07,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:24:07,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:07,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:24:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:24:07,422 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:10,399 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-05-21 21:24:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:24:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:10,405 INFO L225 Difference]: With dead ends: 5242 [2021-05-21 21:24:10,405 INFO L226 Difference]: Without dead ends: 5242 [2021-05-21 21:24:10,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2815.7ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:24:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-05-21 21:24:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-05-21 21:24:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-05-21 21:24:10,453 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-05-21 21:24:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:10,453 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-05-21 21:24:10,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-05-21 21:24:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:10,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:10,457 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:10,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-05-21 21:24:10,658 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-05-21 21:24:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:10,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555074067] [2021-05-21 21:24:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:10,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:10,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555074067] [2021-05-21 21:24:10,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555074067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:10,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920933673] [2021-05-21 21:24:10,942 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:10,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:24:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:10,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:24:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920933673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:24:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918249351] [2021-05-21 21:24:11,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:24:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:24:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:24:11,747 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:14,528 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-05-21 21:24:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:24:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:14,534 INFO L225 Difference]: With dead ends: 5461 [2021-05-21 21:24:14,534 INFO L226 Difference]: Without dead ends: 5461 [2021-05-21 21:24:14,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2775.4ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 21:24:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-05-21 21:24:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-05-21 21:24:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-05-21 21:24:14,589 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-05-21 21:24:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:14,590 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-05-21 21:24:14,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-05-21 21:24:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:14,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:14,595 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:14,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:14,801 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-05-21 21:24:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584118666] [2021-05-21 21:24:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:15,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:15,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584118666] [2021-05-21 21:24:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584118666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:15,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564009058] [2021-05-21 21:24:15,086 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 21:24:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564009058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:24:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117231495] [2021-05-21 21:24:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:24:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:24:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:24:15,792 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:18,767 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-05-21 21:24:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:24:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:18,773 INFO L225 Difference]: With dead ends: 5286 [2021-05-21 21:24:18,773 INFO L226 Difference]: Without dead ends: 5286 [2021-05-21 21:24:18,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2757.7ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:24:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-05-21 21:24:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-05-21 21:24:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-05-21 21:24:18,826 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-05-21 21:24:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:18,826 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-05-21 21:24:18,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-05-21 21:24:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:18,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:18,830 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:19,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-05-21 21:24:19,031 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-05-21 21:24:19,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:19,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952271864] [2021-05-21 21:24:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:19,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:19,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952271864] [2021-05-21 21:24:19,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952271864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:19,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413294307] [2021-05-21 21:24:19,334 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:19,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:24:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:24:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:19,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413294307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:19,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:19,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-21 21:24:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904064809] [2021-05-21 21:24:19,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:24:19,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:19,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:24:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:24:19,894 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:26,279 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-05-21 21:24:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-21 21:24:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:26,284 INFO L225 Difference]: With dead ends: 6084 [2021-05-21 21:24:26,284 INFO L226 Difference]: Without dead ends: 6042 [2021-05-21 21:24:26,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5619.9ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-05-21 21:24:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-05-21 21:24:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-05-21 21:24:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-05-21 21:24:26,334 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-05-21 21:24:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:26,334 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-05-21 21:24:26,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-05-21 21:24:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:26,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:26,338 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:26,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-05-21 21:24:26,538 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-05-21 21:24:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:26,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111018775] [2021-05-21 21:24:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:26,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:26,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111018775] [2021-05-21 21:24:26,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111018775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:26,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858294098] [2021-05-21 21:24:26,817 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:26,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:24:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:24:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:27,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858294098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:27,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:27,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-05-21 21:24:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791408440] [2021-05-21 21:24:27,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:24:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:24:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:24:27,383 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:32,023 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-05-21 21:24:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-21 21:24:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:32,030 INFO L225 Difference]: With dead ends: 6513 [2021-05-21 21:24:32,030 INFO L226 Difference]: Without dead ends: 6447 [2021-05-21 21:24:32,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 4165.3ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:24:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-05-21 21:24:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-05-21 21:24:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-05-21 21:24:32,090 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-05-21 21:24:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:32,090 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-05-21 21:24:32,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-05-21 21:24:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:32,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:32,094 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:32,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-05-21 21:24:32,295 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-05-21 21:24:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323857928] [2021-05-21 21:24:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:32,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323857928] [2021-05-21 21:24:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323857928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494363603] [2021-05-21 21:24:32,632 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:32,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:24:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:32,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:24:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494363603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:33,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-21 21:24:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700343922] [2021-05-21 21:24:33,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:24:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:24:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:24:33,333 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:35,366 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-05-21 21:24:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:24:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-21 21:24:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:35,371 INFO L225 Difference]: With dead ends: 5247 [2021-05-21 21:24:35,371 INFO L226 Difference]: Without dead ends: 5247 [2021-05-21 21:24:35,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2105.2ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:24:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-05-21 21:24:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-05-21 21:24:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-05-21 21:24:35,427 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-05-21 21:24:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:35,427 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-05-21 21:24:35,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-05-21 21:24:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:35,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:35,432 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:35,632 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-05-21 21:24:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875814780] [2021-05-21 21:24:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:35,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:35,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875814780] [2021-05-21 21:24:35,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875814780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:35,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176088568] [2021-05-21 21:24:35,937 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:35,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:24:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:24:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:36,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176088568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:36,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:36,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-21 21:24:36,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013755349] [2021-05-21 21:24:36,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:24:36,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:24:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:24:36,687 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:39,338 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-21 21:24:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:39,911 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-05-21 21:24:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:24:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-21 21:24:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:39,916 INFO L225 Difference]: With dead ends: 5227 [2021-05-21 21:24:39,916 INFO L226 Difference]: Without dead ends: 5227 [2021-05-21 21:24:39,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3110.3ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:24:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-05-21 21:24:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-05-21 21:24:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-05-21 21:24:39,965 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-05-21 21:24:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:39,965 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-05-21 21:24:39,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-05-21 21:24:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:39,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:39,969 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:40,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:40,170 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-05-21 21:24:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:40,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476567941] [2021-05-21 21:24:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:40,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476567941] [2021-05-21 21:24:40,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476567941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562316287] [2021-05-21 21:24:40,483 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:40,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:24:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:40,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:24:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:41,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562316287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:41,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:41,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-21 21:24:41,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369789552] [2021-05-21 21:24:41,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:24:41,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:24:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:24:41,238 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:44,230 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-05-21 21:24:44,419 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-05-21 21:24:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:44,600 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-05-21 21:24:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:24:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-21 21:24:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:44,606 INFO L225 Difference]: With dead ends: 5273 [2021-05-21 21:24:44,606 INFO L226 Difference]: Without dead ends: 5273 [2021-05-21 21:24:44,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 3256.0ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 21:24:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-05-21 21:24:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-05-21 21:24:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-05-21 21:24:44,666 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-05-21 21:24:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:44,666 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-05-21 21:24:44,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-21 21:24:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-05-21 21:24:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:44,670 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:44,670 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:44,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-05-21 21:24:44,871 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-05-21 21:24:44,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:44,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304260322] [2021-05-21 21:24:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:45,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304260322] [2021-05-21 21:24:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304260322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329679700] [2021-05-21 21:24:45,178 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:45,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-21 21:24:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:45,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329679700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:45,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:45,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-21 21:24:45,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79776383] [2021-05-21 21:24:45,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:24:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:24:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:24:45,997 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:49,544 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-05-21 21:24:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:24:49,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:49,550 INFO L225 Difference]: With dead ends: 5834 [2021-05-21 21:24:49,551 INFO L226 Difference]: Without dead ends: 5834 [2021-05-21 21:24:49,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3473.9ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 21:24:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-05-21 21:24:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-05-21 21:24:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-05-21 21:24:49,606 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-05-21 21:24:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-05-21 21:24:49,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-05-21 21:24:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:49,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:49,610 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:49,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:49,811 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-05-21 21:24:49,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:49,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161333424] [2021-05-21 21:24:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:50,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:50,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161333424] [2021-05-21 21:24:50,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161333424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:50,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445624243] [2021-05-21 21:24:50,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:50,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:24:50,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:50,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:24:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:50,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445624243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:50,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:50,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-05-21 21:24:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641895625] [2021-05-21 21:24:50,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:24:50,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:50,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:24:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:24:50,817 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:54,118 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-05-21 21:24:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 21:24:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:54,124 INFO L225 Difference]: With dead ends: 5198 [2021-05-21 21:24:54,124 INFO L226 Difference]: Without dead ends: 5194 [2021-05-21 21:24:54,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 3082.7ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 21:24:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-05-21 21:24:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-05-21 21:24:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-05-21 21:24:54,174 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-05-21 21:24:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:54,175 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-05-21 21:24:54,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-05-21 21:24:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:54,178 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:54,178 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:54,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-05-21 21:24:54,379 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-05-21 21:24:54,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:54,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713706720] [2021-05-21 21:24:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:54,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713706720] [2021-05-21 21:24:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713706720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184029244] [2021-05-21 21:24:54,662 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:54,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:24:54,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:24:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184029244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:55,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:55,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-05-21 21:24:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007852025] [2021-05-21 21:24:55,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:24:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:24:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:24:55,123 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:58,235 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-05-21 21:24:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 21:24:58,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:24:58,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:58,242 INFO L225 Difference]: With dead ends: 6564 [2021-05-21 21:24:58,243 INFO L226 Difference]: Without dead ends: 6360 [2021-05-21 21:24:58,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2651.8ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 21:24:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-05-21 21:24:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-05-21 21:24:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-05-21 21:24:58,305 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-05-21 21:24:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:58,305 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-05-21 21:24:58,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-05-21 21:24:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:24:58,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:58,310 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:24:58,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-05-21 21:24:58,510 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-05-21 21:24:58,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:58,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203015873] [2021-05-21 21:24:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:58,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:58,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203015873] [2021-05-21 21:24:58,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203015873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:58,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445116064] [2021-05-21 21:24:58,784 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:58,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:24:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:58,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:24:58,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:24:59,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445116064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:59,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:59,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-21 21:24:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882624579] [2021-05-21 21:24:59,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:24:59,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:24:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:24:59,428 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:02,069 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-05-21 21:25:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:25:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:02,077 INFO L225 Difference]: With dead ends: 7190 [2021-05-21 21:25:02,077 INFO L226 Difference]: Without dead ends: 7127 [2021-05-21 21:25:02,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2466.3ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 21:25:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-05-21 21:25:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-05-21 21:25:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-05-21 21:25:02,138 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-05-21 21:25:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:02,138 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-05-21 21:25:02,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-05-21 21:25:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:02,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:02,143 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:02,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-05-21 21:25:02,345 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-05-21 21:25:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:02,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62879905] [2021-05-21 21:25:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:02,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62879905] [2021-05-21 21:25:02,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62879905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497103572] [2021-05-21 21:25:02,611 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:02,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:25:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:25:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497103572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:03,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:03,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-21 21:25:03,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967326803] [2021-05-21 21:25:03,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:25:03,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:03,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:25:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:25:03,238 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:06,572 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-05-21 21:25:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:25:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:06,579 INFO L225 Difference]: With dead ends: 7812 [2021-05-21 21:25:06,579 INFO L226 Difference]: Without dead ends: 7773 [2021-05-21 21:25:06,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3183.7ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 21:25:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-05-21 21:25:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-05-21 21:25:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-05-21 21:25:06,650 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-05-21 21:25:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:06,650 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-05-21 21:25:06,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-05-21 21:25:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:06,655 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:06,655 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:06,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-05-21 21:25:06,857 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-05-21 21:25:06,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:06,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159576491] [2021-05-21 21:25:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:07,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:07,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159576491] [2021-05-21 21:25:07,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159576491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:07,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851806805] [2021-05-21 21:25:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:07,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:25:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:25:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:07,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851806805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:07,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:07,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-21 21:25:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198025996] [2021-05-21 21:25:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:25:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:25:07,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:25:07,754 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:11,989 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-05-21 21:25:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 21:25:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:11,998 INFO L225 Difference]: With dead ends: 7788 [2021-05-21 21:25:11,998 INFO L226 Difference]: Without dead ends: 7746 [2021-05-21 21:25:11,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3905.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 21:25:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-05-21 21:25:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-05-21 21:25:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-05-21 21:25:12,073 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-05-21 21:25:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:12,073 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-05-21 21:25:12,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-05-21 21:25:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:12,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:12,078 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:12,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:12,278 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-05-21 21:25:12,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:12,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668122779] [2021-05-21 21:25:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:12,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668122779] [2021-05-21 21:25:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668122779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867597392] [2021-05-21 21:25:12,502 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:12,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:25:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:13,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867597392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:13,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:13,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:25:13,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202826573] [2021-05-21 21:25:13,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:25:13,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:25:13,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:25:13,187 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:15,925 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-05-21 21:25:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:25:15,926 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:15,932 INFO L225 Difference]: With dead ends: 5965 [2021-05-21 21:25:15,932 INFO L226 Difference]: Without dead ends: 5935 [2021-05-21 21:25:15,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2440.5ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 21:25:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-05-21 21:25:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-05-21 21:25:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-05-21 21:25:15,990 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-05-21 21:25:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:15,990 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-05-21 21:25:15,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-05-21 21:25:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:15,995 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:15,995 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:16,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-05-21 21:25:16,196 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-05-21 21:25:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475911682] [2021-05-21 21:25:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:16,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:16,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475911682] [2021-05-21 21:25:16,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475911682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:16,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056216180] [2021-05-21 21:25:16,415 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:16,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:25:16,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:16,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:25:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:17,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056216180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:17,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:17,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:25:17,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595368048] [2021-05-21 21:25:17,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:25:17,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:25:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:25:17,112 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:20,324 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-05-21 21:25:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:25:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:20,330 INFO L225 Difference]: With dead ends: 5816 [2021-05-21 21:25:20,330 INFO L226 Difference]: Without dead ends: 5798 [2021-05-21 21:25:20,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2934.2ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 21:25:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-05-21 21:25:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-05-21 21:25:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-05-21 21:25:20,387 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-05-21 21:25:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:20,387 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-05-21 21:25:20,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-05-21 21:25:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:20,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:20,392 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:20,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-05-21 21:25:20,594 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-05-21 21:25:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394850371] [2021-05-21 21:25:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:20,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:20,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394850371] [2021-05-21 21:25:20,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394850371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:20,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748496808] [2021-05-21 21:25:20,832 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:20,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:25:20,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:20,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:25:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:21,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748496808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:21,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:21,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-05-21 21:25:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530091690] [2021-05-21 21:25:21,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:25:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:25:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:25:21,388 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:33,961 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-05-21 21:25:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-05-21 21:25:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:33,993 INFO L225 Difference]: With dead ends: 7773 [2021-05-21 21:25:33,994 INFO L226 Difference]: Without dead ends: 7761 [2021-05-21 21:25:33,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 10966.6ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-05-21 21:25:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-05-21 21:25:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-05-21 21:25:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-05-21 21:25:34,061 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-05-21 21:25:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:34,061 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-05-21 21:25:34,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-05-21 21:25:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:34,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:34,066 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:34,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:34,266 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-05-21 21:25:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:34,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450078312] [2021-05-21 21:25:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:34,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:34,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450078312] [2021-05-21 21:25:34,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450078312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:34,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916287387] [2021-05-21 21:25:34,493 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:34,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:25:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:34,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:25:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:35,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916287387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:35,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:35,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:25:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974458805] [2021-05-21 21:25:35,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:25:35,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:25:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:25:35,201 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:37,989 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-05-21 21:25:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:25:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:37,995 INFO L225 Difference]: With dead ends: 5766 [2021-05-21 21:25:37,995 INFO L226 Difference]: Without dead ends: 5766 [2021-05-21 21:25:37,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2691.3ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 21:25:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-05-21 21:25:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-05-21 21:25:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-05-21 21:25:38,054 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-05-21 21:25:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:38,054 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-05-21 21:25:38,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-05-21 21:25:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:38,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:38,059 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:38,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-05-21 21:25:38,260 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:38,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-05-21 21:25:38,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:38,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026520804] [2021-05-21 21:25:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:38,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:38,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026520804] [2021-05-21 21:25:38,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026520804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:38,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765998701] [2021-05-21 21:25:38,520 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:38,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:25:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:38,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:25:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:39,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765998701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:39,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:39,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:25:39,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179716058] [2021-05-21 21:25:39,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:25:39,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:39,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:25:39,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:25:39,302 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:43,851 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-05-21 21:25:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:25:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:25:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:43,858 INFO L225 Difference]: With dead ends: 6342 [2021-05-21 21:25:43,858 INFO L226 Difference]: Without dead ends: 6285 [2021-05-21 21:25:43,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 4108.4ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-05-21 21:25:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-05-21 21:25:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-05-21 21:25:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-05-21 21:25:43,918 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-05-21 21:25:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:43,918 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-05-21 21:25:43,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-05-21 21:25:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:25:43,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:43,923 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:25:44,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-05-21 21:25:44,124 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-05-21 21:25:44,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:44,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155806931] [2021-05-21 21:25:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:44,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155806931] [2021-05-21 21:25:44,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155806931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683936830] [2021-05-21 21:25:44,364 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:25:44,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:25:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:25:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:25:44,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683936830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:44,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:44,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-21 21:25:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37937119] [2021-05-21 21:25:44,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:25:44,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:25:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:25:44,942 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:00,308 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-05-21 21:26:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-05-21 21:26:00,308 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:00,316 INFO L225 Difference]: With dead ends: 8099 [2021-05-21 21:26:00,316 INFO L226 Difference]: Without dead ends: 8087 [2021-05-21 21:26:00,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 13547.9ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-05-21 21:26:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-05-21 21:26:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-05-21 21:26:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-05-21 21:26:00,388 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-05-21 21:26:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:00,388 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-05-21 21:26:00,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-05-21 21:26:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:00,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:00,393 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:00,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-05-21 21:26:00,595 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-05-21 21:26:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:00,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214265499] [2021-05-21 21:26:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:00,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:00,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214265499] [2021-05-21 21:26:00,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214265499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:00,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762955449] [2021-05-21 21:26:00,837 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:00,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-21 21:26:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762955449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:01,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:01,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 21:26:01,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432167815] [2021-05-21 21:26:01,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:26:01,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:01,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:26:01,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:26:01,586 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:05,223 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-05-21 21:26:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 21:26:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:05,230 INFO L225 Difference]: With dead ends: 6293 [2021-05-21 21:26:05,230 INFO L226 Difference]: Without dead ends: 6284 [2021-05-21 21:26:05,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 3197.7ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:26:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-05-21 21:26:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-05-21 21:26:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-05-21 21:26:05,292 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-05-21 21:26:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:05,292 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-05-21 21:26:05,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-05-21 21:26:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:05,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:05,297 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:05,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-05-21 21:26:05,497 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-05-21 21:26:05,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:05,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483605267] [2021-05-21 21:26:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:05,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483605267] [2021-05-21 21:26:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483605267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815599659] [2021-05-21 21:26:05,745 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:05,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:26:05,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:26:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:06,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815599659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:06,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-21 21:26:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410678331] [2021-05-21 21:26:06,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:26:06,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:26:06,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:26:06,359 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:07,311 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-21 21:26:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:10,198 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-05-21 21:26:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:26:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:10,206 INFO L225 Difference]: With dead ends: 7671 [2021-05-21 21:26:10,206 INFO L226 Difference]: Without dead ends: 7636 [2021-05-21 21:26:10,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3618.5ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 21:26:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-05-21 21:26:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-05-21 21:26:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-05-21 21:26:10,287 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-05-21 21:26:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:10,287 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-05-21 21:26:10,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-05-21 21:26:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:10,292 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:10,292 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:10,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:10,492 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-05-21 21:26:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:10,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641381734] [2021-05-21 21:26:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:10,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:10,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641381734] [2021-05-21 21:26:10,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641381734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:10,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097528337] [2021-05-21 21:26:10,683 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:10,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:26:10,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:10,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:26:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:26:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097528337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:11,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:11,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-05-21 21:26:11,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840960120] [2021-05-21 21:26:11,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:26:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:26:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:26:11,132 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:11,791 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-05-21 21:26:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:26:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:11,799 INFO L225 Difference]: With dead ends: 6845 [2021-05-21 21:26:11,799 INFO L226 Difference]: Without dead ends: 6841 [2021-05-21 21:26:11,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:26:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-05-21 21:26:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-05-21 21:26:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-05-21 21:26:11,864 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-05-21 21:26:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:11,864 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-05-21 21:26:11,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-05-21 21:26:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:11,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:11,869 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:12,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-05-21 21:26:12,071 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-05-21 21:26:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:12,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810755414] [2021-05-21 21:26:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:12,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810755414] [2021-05-21 21:26:12,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810755414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242852650] [2021-05-21 21:26:12,386 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:12,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:26:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:26:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:12,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242852650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:12,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:12,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-21 21:26:12,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704371209] [2021-05-21 21:26:12,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:26:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:26:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:26:12,970 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:16,776 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-05-21 21:26:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 21:26:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:16,785 INFO L225 Difference]: With dead ends: 8549 [2021-05-21 21:26:16,785 INFO L226 Difference]: Without dead ends: 8498 [2021-05-21 21:26:16,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3591.4ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 21:26:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-05-21 21:26:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-05-21 21:26:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-05-21 21:26:16,865 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-05-21 21:26:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:16,865 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-05-21 21:26:16,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-05-21 21:26:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:16,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:16,870 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:17,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:17,071 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-05-21 21:26:17,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:17,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013878416] [2021-05-21 21:26:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:17,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:17,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013878416] [2021-05-21 21:26:17,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013878416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:17,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872476225] [2021-05-21 21:26:17,531 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:17,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:26:17,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:17,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:26:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:18,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872476225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:18,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:18,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:26:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548059322] [2021-05-21 21:26:18,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:18,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:18,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:18,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:18,344 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:20,487 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-05-21 21:26:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:26:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:20,493 INFO L225 Difference]: With dead ends: 6341 [2021-05-21 21:26:20,494 INFO L226 Difference]: Without dead ends: 6287 [2021-05-21 21:26:20,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2577.1ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:26:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-05-21 21:26:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-05-21 21:26:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-05-21 21:26:20,557 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-05-21 21:26:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:20,557 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-05-21 21:26:20,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-05-21 21:26:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:20,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:20,563 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:20,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-05-21 21:26:20,765 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-05-21 21:26:20,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:20,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344410822] [2021-05-21 21:26:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:21,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344410822] [2021-05-21 21:26:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344410822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:21,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702827914] [2021-05-21 21:26:21,087 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:21,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:26:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:21,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:26:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702827914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:21,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:21,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:26:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935388368] [2021-05-21 21:26:21,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:21,875 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:26,473 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-05-21 21:26:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 21:26:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:26,479 INFO L225 Difference]: With dead ends: 6444 [2021-05-21 21:26:26,480 INFO L226 Difference]: Without dead ends: 6408 [2021-05-21 21:26:26,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4450.7ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 21:26:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-05-21 21:26:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-05-21 21:26:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-05-21 21:26:26,549 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-05-21 21:26:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:26,549 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-05-21 21:26:26,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-05-21 21:26:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:26,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:26,555 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:26,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-05-21 21:26:26,757 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-05-21 21:26:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:26,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718546536] [2021-05-21 21:26:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:27,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:27,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718546536] [2021-05-21 21:26:27,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718546536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:27,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317885755] [2021-05-21 21:26:27,075 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:26:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:27,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317885755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:27,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:27,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:26:27,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269179391] [2021-05-21 21:26:27,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:27,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:27,828 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:32,707 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-05-21 21:26:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-21 21:26:32,708 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:32,714 INFO L225 Difference]: With dead ends: 6490 [2021-05-21 21:26:32,714 INFO L226 Difference]: Without dead ends: 6421 [2021-05-21 21:26:32,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4629.1ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-05-21 21:26:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-05-21 21:26:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-05-21 21:26:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-05-21 21:26:32,778 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-05-21 21:26:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:32,778 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-05-21 21:26:32,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-05-21 21:26:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:32,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:32,784 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:32,984 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-05-21 21:26:32,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256030959] [2021-05-21 21:26:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:33,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:33,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256030959] [2021-05-21 21:26:33,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256030959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:33,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605018726] [2021-05-21 21:26:33,279 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:33,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:26:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:33,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-21 21:26:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:34,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605018726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:34,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:34,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:26:34,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396881069] [2021-05-21 21:26:34,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:34,146 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:37,507 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-05-21 21:26:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:26:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:37,514 INFO L225 Difference]: With dead ends: 6707 [2021-05-21 21:26:37,514 INFO L226 Difference]: Without dead ends: 6707 [2021-05-21 21:26:37,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3231.6ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:26:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-05-21 21:26:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-05-21 21:26:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-05-21 21:26:37,582 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-05-21 21:26:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:37,582 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-05-21 21:26:37,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-05-21 21:26:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:37,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:37,587 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:37,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-05-21 21:26:37,787 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:37,787 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-05-21 21:26:37,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:37,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662286671] [2021-05-21 21:26:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:38,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:38,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662286671] [2021-05-21 21:26:38,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662286671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:38,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573192725] [2021-05-21 21:26:38,081 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:38,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:26:38,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:38,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:26:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:38,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573192725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:38,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:38,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:26:38,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613733879] [2021-05-21 21:26:38,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:38,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:38,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:38,811 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:42,937 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-05-21 21:26:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 21:26:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:42,944 INFO L225 Difference]: With dead ends: 6899 [2021-05-21 21:26:42,944 INFO L226 Difference]: Without dead ends: 6848 [2021-05-21 21:26:42,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3822.2ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 21:26:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-05-21 21:26:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-05-21 21:26:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-05-21 21:26:43,012 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-05-21 21:26:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:43,012 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-05-21 21:26:43,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-05-21 21:26:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:43,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:43,017 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:43,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-05-21 21:26:43,217 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-05-21 21:26:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:43,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824795842] [2021-05-21 21:26:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:43,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824795842] [2021-05-21 21:26:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824795842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581153302] [2021-05-21 21:26:43,514 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:43,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:26:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:26:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581153302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:44,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:44,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:26:44,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851135968] [2021-05-21 21:26:44,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:44,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:44,293 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:50,214 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-05-21 21:26:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-21 21:26:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:50,221 INFO L225 Difference]: With dead ends: 6675 [2021-05-21 21:26:50,221 INFO L226 Difference]: Without dead ends: 6603 [2021-05-21 21:26:50,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5561.8ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:26:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-05-21 21:26:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-05-21 21:26:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-05-21 21:26:50,292 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-05-21 21:26:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:50,293 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-05-21 21:26:50,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-05-21 21:26:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:50,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:50,298 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:50,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:50,499 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-05-21 21:26:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:50,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331300220] [2021-05-21 21:26:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:50,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:50,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331300220] [2021-05-21 21:26:50,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331300220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:50,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227516753] [2021-05-21 21:26:50,793 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:50,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:26:50,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:50,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:26:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:51,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227516753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:51,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:51,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-21 21:26:51,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000938031] [2021-05-21 21:26:51,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:26:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:26:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:26:51,619 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:54,161 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-05-21 21:26:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:26:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:26:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:54,168 INFO L225 Difference]: With dead ends: 6797 [2021-05-21 21:26:54,169 INFO L226 Difference]: Without dead ends: 6755 [2021-05-21 21:26:54,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2633.1ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 21:26:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-05-21 21:26:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-05-21 21:26:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-05-21 21:26:54,244 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-05-21 21:26:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:54,244 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-05-21 21:26:54,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-05-21 21:26:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:26:54,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:54,251 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:54,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-05-21 21:26:54,451 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-05-21 21:26:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:54,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009942994] [2021-05-21 21:26:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:54,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:54,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009942994] [2021-05-21 21:26:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009942994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:54,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435593366] [2021-05-21 21:26:54,757 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:54,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:26:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:26:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:55,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435593366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:55,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:55,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:26:55,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919544248] [2021-05-21 21:26:55,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:26:55,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:26:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:26:55,550 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:11,409 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-05-21 21:27:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-05-21 21:27:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:11,418 INFO L225 Difference]: With dead ends: 8496 [2021-05-21 21:27:11,418 INFO L226 Difference]: Without dead ends: 8484 [2021-05-21 21:27:11,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 14599.6ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-05-21 21:27:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-05-21 21:27:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-05-21 21:27:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-05-21 21:27:11,531 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-05-21 21:27:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:11,531 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-05-21 21:27:11,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-05-21 21:27:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:11,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:11,538 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:11,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:11,738 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-05-21 21:27:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:11,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532068333] [2021-05-21 21:27:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:12,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532068333] [2021-05-21 21:27:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532068333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536719008] [2021-05-21 21:27:12,047 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:12,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:27:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536719008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:12,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:12,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 21:27:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742746188] [2021-05-21 21:27:12,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:27:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:27:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:27:12,893 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:15,569 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-05-21 21:27:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:27:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:15,576 INFO L225 Difference]: With dead ends: 6909 [2021-05-21 21:27:15,576 INFO L226 Difference]: Without dead ends: 6891 [2021-05-21 21:27:15,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2533.9ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:27:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-05-21 21:27:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-05-21 21:27:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-05-21 21:27:15,661 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-05-21 21:27:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:15,661 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-05-21 21:27:15,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-05-21 21:27:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:15,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:15,668 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:15,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-05-21 21:27:15,868 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-05-21 21:27:15,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:15,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926875584] [2021-05-21 21:27:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:16,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:16,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926875584] [2021-05-21 21:27:16,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926875584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:16,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249339715] [2021-05-21 21:27:16,166 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:16,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:27:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:16,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249339715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:16,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:16,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-21 21:27:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942238717] [2021-05-21 21:27:16,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:27:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:16,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:27:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:27:16,870 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:21,197 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-05-21 21:27:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-21 21:27:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:21,206 INFO L225 Difference]: With dead ends: 8689 [2021-05-21 21:27:21,206 INFO L226 Difference]: Without dead ends: 8655 [2021-05-21 21:27:21,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 4025.4ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-05-21 21:27:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-05-21 21:27:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-05-21 21:27:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-05-21 21:27:21,295 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-05-21 21:27:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:21,295 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-05-21 21:27:21,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-05-21 21:27:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:21,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:21,301 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:21,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:21,502 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-05-21 21:27:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:21,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232923670] [2021-05-21 21:27:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232923670] [2021-05-21 21:27:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232923670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084380848] [2021-05-21 21:27:21,800 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:21,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:27:21,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:21,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:27:21,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084380848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:22,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:22,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-21 21:27:22,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040400682] [2021-05-21 21:27:22,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:27:22,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:22,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:27:22,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:27:22,234 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:26,568 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-05-21 21:27:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 21:27:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:26,576 INFO L225 Difference]: With dead ends: 8866 [2021-05-21 21:27:26,577 INFO L226 Difference]: Without dead ends: 8800 [2021-05-21 21:27:26,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3548.2ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 21:27:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-05-21 21:27:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-05-21 21:27:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-05-21 21:27:26,660 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-05-21 21:27:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:26,660 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-05-21 21:27:26,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-05-21 21:27:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:26,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:26,666 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:26,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-05-21 21:27:26,866 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-05-21 21:27:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:26,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184398140] [2021-05-21 21:27:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:27,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184398140] [2021-05-21 21:27:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184398140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678502116] [2021-05-21 21:27:27,145 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:27,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:27,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:27:27,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:27,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678502116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:27,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:27,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-21 21:27:27,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030397577] [2021-05-21 21:27:27,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:27:27,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:27:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:27:27,602 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:32,865 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-05-21 21:27:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:27:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:32,876 INFO L225 Difference]: With dead ends: 10348 [2021-05-21 21:27:32,876 INFO L226 Difference]: Without dead ends: 10305 [2021-05-21 21:27:32,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4378.2ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-05-21 21:27:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-05-21 21:27:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-05-21 21:27:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-05-21 21:27:32,972 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-05-21 21:27:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:32,972 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-05-21 21:27:32,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-05-21 21:27:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:32,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:32,978 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:33,178 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-05-21 21:27:33,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959483025] [2021-05-21 21:27:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:33,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:33,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959483025] [2021-05-21 21:27:33,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959483025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:33,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995821167] [2021-05-21 21:27:33,462 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:33,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:27:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:33,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:27:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995821167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:34,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:34,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-05-21 21:27:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368207971] [2021-05-21 21:27:34,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:27:34,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:34,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:27:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:27:34,243 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:36,769 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-05-21 21:27:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 21:27:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:36,777 INFO L225 Difference]: With dead ends: 7588 [2021-05-21 21:27:36,777 INFO L226 Difference]: Without dead ends: 7588 [2021-05-21 21:27:36,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2474.1ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:27:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-05-21 21:27:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-05-21 21:27:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-05-21 21:27:36,855 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-05-21 21:27:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:36,855 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-05-21 21:27:36,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-05-21 21:27:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:36,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:36,862 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:37,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-05-21 21:27:37,062 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-05-21 21:27:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:37,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486535835] [2021-05-21 21:27:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:37,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:37,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486535835] [2021-05-21 21:27:37,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486535835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:37,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138844260] [2021-05-21 21:27:37,352 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:37,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:27:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:27:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138844260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:38,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:38,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-21 21:27:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905637908] [2021-05-21 21:27:38,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:27:38,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:27:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:27:38,040 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:43,265 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-05-21 21:27:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 21:27:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:43,274 INFO L225 Difference]: With dead ends: 9465 [2021-05-21 21:27:43,274 INFO L226 Difference]: Without dead ends: 9404 [2021-05-21 21:27:43,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4859.6ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-05-21 21:27:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-05-21 21:27:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-05-21 21:27:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-05-21 21:27:43,362 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-05-21 21:27:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:43,362 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-05-21 21:27:43,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-05-21 21:27:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:43,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:43,368 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:43,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-05-21 21:27:43,569 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-05-21 21:27:43,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:43,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884895961] [2021-05-21 21:27:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:43,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:43,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884895961] [2021-05-21 21:27:43,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884895961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:43,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918635270] [2021-05-21 21:27:43,828 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:43,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:27:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:44,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918635270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:44,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:44,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:27:44,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8222042] [2021-05-21 21:27:44,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:27:44,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:27:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:27:44,589 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:49,176 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-05-21 21:27:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:27:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:49,189 INFO L225 Difference]: With dead ends: 12834 [2021-05-21 21:27:49,189 INFO L226 Difference]: Without dead ends: 12677 [2021-05-21 21:27:49,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 4351.5ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-05-21 21:27:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-05-21 21:27:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-05-21 21:27:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-05-21 21:27:49,302 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-05-21 21:27:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:49,302 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-05-21 21:27:49,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-05-21 21:27:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:49,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:49,308 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-05-21 21:27:49,509 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-05-21 21:27:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:49,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596418228] [2021-05-21 21:27:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:49,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:49,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596418228] [2021-05-21 21:27:49,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596418228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:49,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445883962] [2021-05-21 21:27:49,780 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:49,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:49,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:49,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:27:49,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:50,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445883962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:50,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:50,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-21 21:27:50,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929915010] [2021-05-21 21:27:50,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:27:50,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:27:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:27:50,625 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:54,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:54,497 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-05-21 21:27:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:27:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:54,509 INFO L225 Difference]: With dead ends: 10016 [2021-05-21 21:27:54,509 INFO L226 Difference]: Without dead ends: 9961 [2021-05-21 21:27:54,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3860.9ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:27:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-05-21 21:27:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-05-21 21:27:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-05-21 21:27:54,634 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-05-21 21:27:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:54,634 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-05-21 21:27:54,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-05-21 21:27:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:54,641 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:54,641 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:54,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:54,842 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-05-21 21:27:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:54,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954014750] [2021-05-21 21:27:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:55,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:55,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954014750] [2021-05-21 21:27:55,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954014750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:55,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995451390] [2021-05-21 21:27:55,175 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:55,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:27:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:27:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:55,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995451390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:55,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:55,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-05-21 21:27:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222709210] [2021-05-21 21:27:55,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:27:55,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:55,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:27:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:27:55,571 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:58,687 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-05-21 21:27:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 21:27:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:27:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:58,697 INFO L225 Difference]: With dead ends: 10247 [2021-05-21 21:27:58,697 INFO L226 Difference]: Without dead ends: 10170 [2021-05-21 21:27:58,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2842.6ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 21:27:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-05-21 21:27:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-05-21 21:27:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-05-21 21:27:58,807 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-05-21 21:27:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:58,808 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-05-21 21:27:58,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-05-21 21:27:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:27:58,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:58,815 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:59,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-05-21 21:27:59,015 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-05-21 21:27:59,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:59,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495734368] [2021-05-21 21:27:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:59,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:59,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495734368] [2021-05-21 21:27:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495734368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:59,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283080691] [2021-05-21 21:27:59,328 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:59,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:59,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:27:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:59,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283080691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:59,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:59,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-21 21:27:59,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352841938] [2021-05-21 21:27:59,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:27:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:59,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:27:59,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:27:59,965 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:02,934 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-05-21 21:28:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:28:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:02,945 INFO L225 Difference]: With dead ends: 11331 [2021-05-21 21:28:02,945 INFO L226 Difference]: Without dead ends: 11256 [2021-05-21 21:28:02,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2954.5ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 21:28:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-05-21 21:28:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-05-21 21:28:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-05-21 21:28:03,049 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-05-21 21:28:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:03,049 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-05-21 21:28:03,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-05-21 21:28:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:03,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:03,057 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:03,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-05-21 21:28:03,257 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-05-21 21:28:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:03,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169725662] [2021-05-21 21:28:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:03,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169725662] [2021-05-21 21:28:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169725662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980744834] [2021-05-21 21:28:03,553 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:03,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:28:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:28:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:28:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980744834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:04,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:04,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-21 21:28:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287350266] [2021-05-21 21:28:04,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:28:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:28:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:28:04,168 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:09,087 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-05-21 21:28:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 21:28:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:09,099 INFO L225 Difference]: With dead ends: 11271 [2021-05-21 21:28:09,099 INFO L226 Difference]: Without dead ends: 11205 [2021-05-21 21:28:09,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4629.2ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 21:28:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-05-21 21:28:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-05-21 21:28:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-05-21 21:28:09,210 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-05-21 21:28:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-05-21 21:28:09,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-05-21 21:28:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:09,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:09,217 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:09,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:09,421 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-05-21 21:28:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:09,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137843886] [2021-05-21 21:28:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:09,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137843886] [2021-05-21 21:28:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137843886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331295918] [2021-05-21 21:28:09,757 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:09,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:28:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:09,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:28:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331295918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:10,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:10,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:28:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143728147] [2021-05-21 21:28:10,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:28:10,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:28:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:28:10,647 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:13,521 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-05-21 21:28:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:28:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:13,531 INFO L225 Difference]: With dead ends: 9319 [2021-05-21 21:28:13,531 INFO L226 Difference]: Without dead ends: 9265 [2021-05-21 21:28:13,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2778.9ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 21:28:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-05-21 21:28:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-05-21 21:28:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-05-21 21:28:13,654 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-05-21 21:28:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:13,654 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-05-21 21:28:13,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-05-21 21:28:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:13,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:13,662 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:13,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-05-21 21:28:13,862 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-05-21 21:28:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:13,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090985398] [2021-05-21 21:28:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:14,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:14,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090985398] [2021-05-21 21:28:14,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090985398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:14,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555255483] [2021-05-21 21:28:14,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:28:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:15,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555255483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:15,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:15,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-21 21:28:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290295757] [2021-05-21 21:28:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:28:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:28:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:28:15,030 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:21,707 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-05-21 21:28:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-21 21:28:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:21,718 INFO L225 Difference]: With dead ends: 9415 [2021-05-21 21:28:21,718 INFO L226 Difference]: Without dead ends: 9370 [2021-05-21 21:28:21,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5925.0ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:28:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-05-21 21:28:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-05-21 21:28:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-05-21 21:28:21,825 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-05-21 21:28:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:21,825 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-05-21 21:28:21,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-05-21 21:28:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:21,834 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:21,834 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:22,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:22,034 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:22,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-05-21 21:28:22,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:22,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483629123] [2021-05-21 21:28:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:22,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:22,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483629123] [2021-05-21 21:28:22,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483629123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:22,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330832924] [2021-05-21 21:28:22,364 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:22,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:28:22,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:28:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:23,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330832924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:23,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:23,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-21 21:28:23,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248851724] [2021-05-21 21:28:23,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:28:23,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:28:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:28:23,087 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:29,902 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-05-21 21:28:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:28:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:29,910 INFO L225 Difference]: With dead ends: 9447 [2021-05-21 21:28:29,910 INFO L226 Difference]: Without dead ends: 9429 [2021-05-21 21:28:29,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5790.2ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-05-21 21:28:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-05-21 21:28:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-05-21 21:28:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-05-21 21:28:30,009 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-05-21 21:28:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:30,009 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-05-21 21:28:30,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-05-21 21:28:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:30,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:30,016 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:30,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-05-21 21:28:30,217 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-05-21 21:28:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:30,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356647233] [2021-05-21 21:28:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:30,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:30,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356647233] [2021-05-21 21:28:30,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356647233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:30,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551960963] [2021-05-21 21:28:30,556 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:30,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:28:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:28:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:30,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551960963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:30,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:30,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-05-21 21:28:30,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079507679] [2021-05-21 21:28:30,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:28:30,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:30,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:28:30,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:28:30,985 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:36,413 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-05-21 21:28:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-21 21:28:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:36,424 INFO L225 Difference]: With dead ends: 10286 [2021-05-21 21:28:36,424 INFO L226 Difference]: Without dead ends: 10163 [2021-05-21 21:28:36,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4546.7ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-05-21 21:28:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-05-21 21:28:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-05-21 21:28:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-05-21 21:28:36,526 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-05-21 21:28:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:36,526 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-05-21 21:28:36,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-05-21 21:28:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:36,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:36,534 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:36,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:36,734 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-05-21 21:28:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950672568] [2021-05-21 21:28:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:37,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:37,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950672568] [2021-05-21 21:28:37,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950672568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:37,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607694648] [2021-05-21 21:28:37,046 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:37,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:28:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:28:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:37,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607694648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:37,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:37,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-21 21:28:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452888491] [2021-05-21 21:28:37,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:28:37,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:28:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:28:37,727 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:40,763 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-05-21 21:28:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:28:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:40,774 INFO L225 Difference]: With dead ends: 10792 [2021-05-21 21:28:40,774 INFO L226 Difference]: Without dead ends: 10724 [2021-05-21 21:28:40,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2900.8ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 21:28:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-05-21 21:28:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-05-21 21:28:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-05-21 21:28:40,878 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-05-21 21:28:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:40,879 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-05-21 21:28:40,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-05-21 21:28:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:40,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:40,886 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:41,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-05-21 21:28:41,087 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:41,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:41,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-05-21 21:28:41,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:41,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630159192] [2021-05-21 21:28:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:41,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630159192] [2021-05-21 21:28:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630159192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594771567] [2021-05-21 21:28:41,418 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:41,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:28:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:28:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594771567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:42,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-21 21:28:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461339312] [2021-05-21 21:28:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:28:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:28:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:28:42,141 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:46,170 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-05-21 21:28:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:28:46,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:46,182 INFO L225 Difference]: With dead ends: 11349 [2021-05-21 21:28:46,183 INFO L226 Difference]: Without dead ends: 11303 [2021-05-21 21:28:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3638.0ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 21:28:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-05-21 21:28:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-05-21 21:28:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-05-21 21:28:46,296 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-05-21 21:28:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:46,296 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-05-21 21:28:46,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-05-21 21:28:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:46,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:46,304 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:46,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-05-21 21:28:46,505 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-05-21 21:28:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092206974] [2021-05-21 21:28:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:46,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092206974] [2021-05-21 21:28:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092206974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046997407] [2021-05-21 21:28:46,794 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:46,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:28:46,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:46,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-21 21:28:46,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:47,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046997407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:47,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:47,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:28:47,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467916299] [2021-05-21 21:28:47,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:28:47,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:28:47,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:28:47,747 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:53,641 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-05-21 21:28:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:28:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:28:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:53,656 INFO L225 Difference]: With dead ends: 12806 [2021-05-21 21:28:53,656 INFO L226 Difference]: Without dead ends: 12763 [2021-05-21 21:28:53,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5627.3ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-05-21 21:28:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-05-21 21:28:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-05-21 21:28:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-05-21 21:28:53,790 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-05-21 21:28:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:53,791 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-05-21 21:28:53,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-05-21 21:28:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:28:53,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:53,799 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:53,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-05-21 21:28:54,000 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-05-21 21:28:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441769619] [2021-05-21 21:28:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:54,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441769619] [2021-05-21 21:28:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441769619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232680476] [2021-05-21 21:28:54,355 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:28:54,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232680476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:55,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:55,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-21 21:28:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348757087] [2021-05-21 21:28:55,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:28:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:28:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:28:55,095 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:00,656 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-05-21 21:29:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:29:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:29:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:00,670 INFO L225 Difference]: With dead ends: 13828 [2021-05-21 21:29:00,670 INFO L226 Difference]: Without dead ends: 13763 [2021-05-21 21:29:00,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4910.9ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:29:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-05-21 21:29:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-05-21 21:29:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-05-21 21:29:00,813 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-05-21 21:29:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-05-21 21:29:00,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-05-21 21:29:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:29:00,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:00,821 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:01,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-05-21 21:29:01,022 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-05-21 21:29:01,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:01,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119499387] [2021-05-21 21:29:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:01,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:01,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119499387] [2021-05-21 21:29:01,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119499387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:01,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383743069] [2021-05-21 21:29:01,307 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:01,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:29:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:01,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:29:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:02,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383743069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:02,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:02,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:29:02,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959289880] [2021-05-21 21:29:02,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:02,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:02,094 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:05,350 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-05-21 21:29:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 21:29:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:29:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:05,362 INFO L225 Difference]: With dead ends: 12038 [2021-05-21 21:29:05,362 INFO L226 Difference]: Without dead ends: 11974 [2021-05-21 21:29:05,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 3242.7ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:29:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-05-21 21:29:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-05-21 21:29:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-05-21 21:29:05,481 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-05-21 21:29:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:05,481 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-05-21 21:29:05,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-05-21 21:29:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:29:05,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:05,490 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:05,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:05,691 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:05,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-05-21 21:29:05,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:05,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719626063] [2021-05-21 21:29:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:06,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:06,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719626063] [2021-05-21 21:29:06,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719626063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:06,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117960548] [2021-05-21 21:29:06,019 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:06,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:29:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:29:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:06,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117960548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:06,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:06,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-05-21 21:29:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719848264] [2021-05-21 21:29:06,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:29:06,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:29:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:29:06,410 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:09,503 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-05-21 21:29:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:29:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:29:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:09,519 INFO L225 Difference]: With dead ends: 13606 [2021-05-21 21:29:09,519 INFO L226 Difference]: Without dead ends: 13480 [2021-05-21 21:29:09,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2741.2ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:29:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-05-21 21:29:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-05-21 21:29:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-05-21 21:29:09,688 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-05-21 21:29:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:09,688 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-05-21 21:29:09,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-05-21 21:29:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:29:09,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:09,697 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:09,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:09,897 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-05-21 21:29:09,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:09,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18374970] [2021-05-21 21:29:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:10,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:10,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18374970] [2021-05-21 21:29:10,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18374970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:10,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523410734] [2021-05-21 21:29:10,366 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:10,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:29:10,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:29:10,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:11,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523410734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:11,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:11,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-21 21:29:11,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085791995] [2021-05-21 21:29:11,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:29:11,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:11,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:29:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:29:11,112 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:17,082 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-05-21 21:29:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-21 21:29:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:29:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:17,096 INFO L225 Difference]: With dead ends: 14288 [2021-05-21 21:29:17,096 INFO L226 Difference]: Without dead ends: 14228 [2021-05-21 21:29:17,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 5397.4ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-05-21 21:29:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-05-21 21:29:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-05-21 21:29:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-05-21 21:29:17,238 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-05-21 21:29:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:17,238 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-05-21 21:29:17,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-05-21 21:29:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:29:17,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:17,247 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-05-21 21:29:17,448 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-05-21 21:29:17,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:17,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054770437] [2021-05-21 21:29:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:17,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:17,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054770437] [2021-05-21 21:29:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054770437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:17,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013451492] [2021-05-21 21:29:17,738 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:17,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:29:17,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:29:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013451492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:18,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:18,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-21 21:29:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408863141] [2021-05-21 21:29:18,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:29:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:29:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:29:18,159 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:21,187 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-05-21 21:29:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:29:21,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:29:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:21,203 INFO L225 Difference]: With dead ends: 14681 [2021-05-21 21:29:21,204 INFO L226 Difference]: Without dead ends: 14530 [2021-05-21 21:29:21,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2712.8ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 21:29:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-05-21 21:29:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-05-21 21:29:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-05-21 21:29:21,356 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-05-21 21:29:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:21,357 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-05-21 21:29:21,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-05-21 21:29:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:21,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:21,367 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:21,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-05-21 21:29:21,567 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-05-21 21:29:21,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:21,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871360654] [2021-05-21 21:29:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:21,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:21,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871360654] [2021-05-21 21:29:21,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871360654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:21,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227598805] [2021-05-21 21:29:21,802 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:21,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:29:21,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227598805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:22,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:22,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:22,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117353700] [2021-05-21 21:29:22,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:22,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:22,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:22,528 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:24,695 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-05-21 21:29:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:29:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:24,711 INFO L225 Difference]: With dead ends: 14325 [2021-05-21 21:29:24,711 INFO L226 Difference]: Without dead ends: 14232 [2021-05-21 21:29:24,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2077.1ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:29:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-05-21 21:29:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-05-21 21:29:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-05-21 21:29:24,862 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-05-21 21:29:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:24,862 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-05-21 21:29:24,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-05-21 21:29:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:24,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:24,872 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:25,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:25,072 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-05-21 21:29:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:25,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897025544] [2021-05-21 21:29:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:25,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897025544] [2021-05-21 21:29:25,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897025544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693224681] [2021-05-21 21:29:25,429 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:26,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693224681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:26,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:26,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:26,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86528721] [2021-05-21 21:29:26,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:26,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:26,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:26,089 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:28,113 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-05-21 21:29:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:29:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:28,129 INFO L225 Difference]: With dead ends: 14246 [2021-05-21 21:29:28,129 INFO L226 Difference]: Without dead ends: 14165 [2021-05-21 21:29:28,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2032.9ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 21:29:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-05-21 21:29:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-05-21 21:29:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-05-21 21:29:28,297 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-05-21 21:29:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:28,298 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-05-21 21:29:28,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-05-21 21:29:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:28,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:28,308 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:28,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:28,508 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-05-21 21:29:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:28,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412597439] [2021-05-21 21:29:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:28,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412597439] [2021-05-21 21:29:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412597439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495233278] [2021-05-21 21:29:28,754 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:28,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:29:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:29,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495233278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:29,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:29,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687663074] [2021-05-21 21:29:29,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:29,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:29,424 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:32,443 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-05-21 21:29:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 21:29:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:32,458 INFO L225 Difference]: With dead ends: 14589 [2021-05-21 21:29:32,459 INFO L226 Difference]: Without dead ends: 14547 [2021-05-21 21:29:32,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2773.6ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:29:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-05-21 21:29:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-05-21 21:29:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-05-21 21:29:32,605 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-05-21 21:29:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:32,606 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-05-21 21:29:32,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-05-21 21:29:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:32,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:32,616 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:32,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-05-21 21:29:32,829 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-05-21 21:29:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:32,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78128655] [2021-05-21 21:29:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:33,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78128655] [2021-05-21 21:29:33,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78128655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186735084] [2021-05-21 21:29:33,104 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:33,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:29:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:33,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186735084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:33,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:33,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:33,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616261660] [2021-05-21 21:29:33,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:33,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:33,866 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:36,440 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-05-21 21:29:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:29:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:36,456 INFO L225 Difference]: With dead ends: 14390 [2021-05-21 21:29:36,456 INFO L226 Difference]: Without dead ends: 14297 [2021-05-21 21:29:36,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2436.1ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:29:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-05-21 21:29:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-05-21 21:29:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-05-21 21:29:36,598 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-05-21 21:29:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:36,598 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-05-21 21:29:36,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-05-21 21:29:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:36,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:36,608 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:36,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:36,808 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-05-21 21:29:36,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:36,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458439365] [2021-05-21 21:29:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:37,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458439365] [2021-05-21 21:29:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458439365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31435191] [2021-05-21 21:29:37,052 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:37,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:29:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31435191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:37,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:37,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:37,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703759664] [2021-05-21 21:29:37,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:37,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:37,947 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:41,411 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-05-21 21:29:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 21:29:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:41,427 INFO L225 Difference]: With dead ends: 14835 [2021-05-21 21:29:41,427 INFO L226 Difference]: Without dead ends: 14793 [2021-05-21 21:29:41,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 3355.1ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:29:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-05-21 21:29:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-05-21 21:29:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-05-21 21:29:41,582 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-05-21 21:29:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:41,582 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-05-21 21:29:41,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-05-21 21:29:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:41,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:41,593 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:41,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-05-21 21:29:41,793 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-05-21 21:29:41,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:41,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316528053] [2021-05-21 21:29:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:42,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:42,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316528053] [2021-05-21 21:29:42,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316528053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839182014] [2021-05-21 21:29:42,036 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:42,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:29:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:42,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:42,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839182014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:42,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:42,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034762284] [2021-05-21 21:29:42,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:42,792 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:47,198 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-05-21 21:29:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 21:29:47,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:47,216 INFO L225 Difference]: With dead ends: 15432 [2021-05-21 21:29:47,216 INFO L226 Difference]: Without dead ends: 15390 [2021-05-21 21:29:47,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 4058.1ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-05-21 21:29:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-05-21 21:29:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-05-21 21:29:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-05-21 21:29:47,396 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-05-21 21:29:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:47,397 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-05-21 21:29:47,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-05-21 21:29:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:47,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:47,406 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:47,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:47,607 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:47,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-05-21 21:29:47,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:47,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489527897] [2021-05-21 21:29:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:47,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489527897] [2021-05-21 21:29:47,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489527897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20792428] [2021-05-21 21:29:47,884 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:47,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:29:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:48,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20792428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:48,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:48,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733024193] [2021-05-21 21:29:48,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:48,669 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:53,648 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-05-21 21:29:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 21:29:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:29:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:53,664 INFO L225 Difference]: With dead ends: 15857 [2021-05-21 21:29:53,665 INFO L226 Difference]: Without dead ends: 15815 [2021-05-21 21:29:53,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4545.1ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:29:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-05-21 21:29:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-05-21 21:29:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-05-21 21:29:53,828 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-05-21 21:29:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:53,829 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-05-21 21:29:53,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-05-21 21:29:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:29:53,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:53,839 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:54,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-05-21 21:29:54,040 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:54,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-05-21 21:29:54,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:54,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619532903] [2021-05-21 21:29:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:54,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:54,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619532903] [2021-05-21 21:29:54,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619532903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:54,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127734483] [2021-05-21 21:29:54,316 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:29:54,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:55,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127734483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:55,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:55,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-21 21:29:55,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878800204] [2021-05-21 21:29:55,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:29:55,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:29:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:29:55,103 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:00,705 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-05-21 21:30:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:30:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:30:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:00,723 INFO L225 Difference]: With dead ends: 16704 [2021-05-21 21:30:00,723 INFO L226 Difference]: Without dead ends: 16655 [2021-05-21 21:30:00,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 5062.3ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-05-21 21:30:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-05-21 21:30:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-05-21 21:30:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-05-21 21:30:00,889 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-05-21 21:30:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:00,890 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-05-21 21:30:00,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-05-21 21:30:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:30:00,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:00,900 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:01,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-05-21 21:30:01,101 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-05-21 21:30:01,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:01,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101724008] [2021-05-21 21:30:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:01,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101724008] [2021-05-21 21:30:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101724008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703539006] [2021-05-21 21:30:01,341 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:01,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:30:01,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:30:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 21:31:13,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-05-21 21:31:13,405 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:31:13,406 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:31:13,408 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:31:13,408 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:31:13 BasicIcfg [2021-05-21 21:31:13,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:31:13,409 INFO L168 Benchmark]: Toolchain (without parser) took 750255.90 ms. Allocated memory was 360.7 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 340.4 MB in the beginning and 2.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 341.5 MB in the beginning and 341.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 360.7 MB. Free memory was 340.3 MB in the beginning and 338.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L168 Benchmark]: Boogie Preprocessor took 13.71 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 963.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L168 Benchmark]: RCFGBuilder took 281.27 ms. Allocated memory is still 360.7 MB. Free memory was 337.8 MB in the beginning and 326.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L168 Benchmark]: TraceAbstraction took 749929.11 ms. Allocated memory was 360.7 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 325.9 MB in the beginning and 2.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-05-21 21:31:13,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 341.5 MB in the beginning and 341.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 360.7 MB. Free memory was 340.3 MB in the beginning and 338.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.71 ms. Allocated memory is still 360.7 MB. Free memory was 338.9 MB in the beginning and 337.9 MB in the end (delta: 963.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 281.27 ms. Allocated memory is still 360.7 MB. Free memory was 337.8 MB in the beginning and 326.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 749929.11 ms. Allocated memory was 360.7 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 325.9 MB in the beginning and 2.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 749814.1ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 620.3ms, AutomataDifference: 501039.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47991 SDslu, 100389 SDs, 0 SdLazy, 260623 SolverSat, 16321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103812.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 470086.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8316.4ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 527.6ms SsaConstructionTime, 2271.5ms SatisfiabilityAnalysisTime, 128048.1ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown