/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/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:25:06,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:25:06,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:25:06,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:25:06,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:25:06,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:25:06,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:25:06,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:25:06,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:25:06,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:25:06,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:25:06,182 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:25:06,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:25:06,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:25:06,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:25:06,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:25:06,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:25:06,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:25:06,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:25:06,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:25:06,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:25:06,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:25:06,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:25:06,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:25:06,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:25:06,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:25:06,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:25:06,461 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:25:06,462 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:25:06,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-06-05 21:25:06,462 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-06-05 21:25:06,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:25:06,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:25:06,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:25:06,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:25:06,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:25:06,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:25:06,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:25:06,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:25:06,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:25:06,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... [2021-06-05 21:25:06,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:25:06,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:25:06,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:25:06,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:25:06,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:25:06,609 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:25:06,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:25:06,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:25:06,610 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:25:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:25:06,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:25:06,610 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:25:06,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:25:06,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:25:06,611 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:25:06,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:25:06,868 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:25:06,869 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:25:06,869 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 21:25:06,870 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:25:06 BoogieIcfgContainer [2021-06-05 21:25:06,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:25:06,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:25:06,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:25:06,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:25:06,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:25:06" (1/2) ... [2021-06-05 21:25:06,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46cb33e4 and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:25:06, skipping insertion in model container [2021-06-05 21:25:06,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:25:06" (2/2) ... [2021-06-05 21:25:06,875 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-06-05 21:25:06,879 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:25:06,879 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:25:06,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:25:06,880 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:25:06,909 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:25:06,923 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:25:06,935 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:25:06,936 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:25:06,936 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:25:06,936 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:25:06,936 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:25:06,936 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:25:06,936 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:25:06,936 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:25:06,941 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 21:25:06,947 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 21:25:06,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:06,953 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:06,953 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:06,956 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-06-05 21:25:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:06,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254188514] [2021-06-05 21:25:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254188514] [2021-06-05 21:25:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254188514] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:25:07,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:25:07,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:25:07,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755342443] [2021-06-05 21:25:07,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:25:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:25:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:25:07,068 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,091 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 21:25:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:25:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 21:25:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,098 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:25:07,099 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 21:25:07,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:25:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 21:25:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 21:25:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 21:25:07,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 21:25:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,125 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 21:25:07,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 21:25:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:25:07,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,126 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:25:07,127 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-06-05 21:25:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272124556] [2021-06-05 21:25:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272124556] [2021-06-05 21:25:07,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272124556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363495006] [2021-06-05 21:25:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:25:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363495006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:07,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 21:25:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338185615] [2021-06-05 21:25:07,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:25:07,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:25:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:25:07,272 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,306 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 21:25:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:25:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:25:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,307 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:25:07,307 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:25:07,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:25:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:25:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 21:25:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 21:25:07,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 21:25:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,311 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 21:25:07,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 21:25:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:25:07,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,311 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:25:07,527 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-06-05 21:25:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367387955] [2021-06-05 21:25:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367387955] [2021-06-05 21:25:07,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367387955] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:25:07,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:25:07,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:25:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941226996] [2021-06-05 21:25:07,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:25:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:25:07,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:25:07,568 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,599 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 21:25:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:25:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:25:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,602 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:25:07,602 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:25:07,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:25:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:25:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:25:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 21:25:07,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 21:25:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,605 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 21:25:07,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 21:25:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:25:07,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,606 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:25:07,606 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-06-05 21:25:07,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806837929] [2021-06-05 21:25:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806837929] [2021-06-05 21:25:07,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806837929] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:25:07,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:25:07,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:25:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530560299] [2021-06-05 21:25:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:25:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:25:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:25:07,654 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,668 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 21:25:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:25:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:25:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,669 INFO L225 Difference]: With dead ends: 20 [2021-06-05 21:25:07,669 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 21:25:07,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:25:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 21:25:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 21:25:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:25:07,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:25:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,672 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:25:07,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:25:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:25:07,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,672 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:25:07,673 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-06-05 21:25:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290245340] [2021-06-05 21:25:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:07,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290245340] [2021-06-05 21:25:07,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290245340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944838749] [2021-06-05 21:25:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:25:07,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944838749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:25:07,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54826587] [2021-06-05 21:25:07,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:25:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:25:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:25:07,757 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,768 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 21:25:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:25:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:25:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,769 INFO L225 Difference]: With dead ends: 24 [2021-06-05 21:25:07,769 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 21:25:07,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:25:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 21:25:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 21:25:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 21:25:07,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 21:25:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,772 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 21:25:07,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 21:25:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:25:07,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,773 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:07,981 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-06-05 21:25:07,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664185981] [2021-06-05 21:25:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:08,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664185981] [2021-06-05 21:25:08,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664185981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383039015] [2021-06-05 21:25:08,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:25:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383039015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:25:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741925210] [2021-06-05 21:25:08,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:25:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:25:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:25:08,149 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:08,175 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 21:25:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:25:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:25:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:08,176 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:25:08,177 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:25:08,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:25:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:25:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 21:25:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 21:25:08,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 21:25:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:08,188 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 21:25:08,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 21:25:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:25:08,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:08,189 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:08,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,398 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-06-05 21:25:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:08,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095270902] [2021-06-05 21:25:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:08,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095270902] [2021-06-05 21:25:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095270902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129344164] [2021-06-05 21:25:08,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:25:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129344164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:25:08,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343542863] [2021-06-05 21:25:08,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:25:08,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:25:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:25:08,525 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-06-05 21:25:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:08,552 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-05 21:25:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:25:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 13 [2021-06-05 21:25:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:08,553 INFO L225 Difference]: With dead ends: 32 [2021-06-05 21:25:08,553 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 21:25:08,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:25:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 21:25:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-05 21:25:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-05 21:25:08,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-05 21:25:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:08,556 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-05 21:25:08,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-06-05 21:25:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-05 21:25:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:25:08,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:08,557 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:08,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,777 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-06-05 21:25:08,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:08,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393599346] [2021-06-05 21:25:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:08,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393599346] [2021-06-05 21:25:08,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393599346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864583292] [2021-06-05 21:25:08,842 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:08,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:08,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:25:08,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864583292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 21:25:08,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494015452] [2021-06-05 21:25:08,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:08,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:08,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:08,937 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:08,967 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-06-05 21:25:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:25:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:25:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:08,968 INFO L225 Difference]: With dead ends: 36 [2021-06-05 21:25:08,968 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 21:25:08,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 21:25:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 21:25:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) 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) [2021-06-05 21:25:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 21:25:08,971 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-06-05 21:25:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:08,971 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 21:25:08,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 21:25:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:08,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:08,972 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:09,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,189 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-06-05 21:25:09,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:09,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470627049] [2021-06-05 21:25:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470627049] [2021-06-05 21:25:09,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470627049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844652024] [2021-06-05 21:25:09,230 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:09,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:09,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:09,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:09,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:09,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:09,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:09,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844652024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:09,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:09,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152390100] [2021-06-05 21:25:09,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:09,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:09,585 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:09,691 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-06-05 21:25:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:25:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:09,693 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:25:09,693 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 21:25:09,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 21:25:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-06-05 21:25:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-06-05 21:25:09,697 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-06-05 21:25:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:09,697 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-06-05 21:25:09,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-06-05 21:25:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:09,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:09,698 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:09,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,909 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-06-05 21:25:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:09,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221787889] [2021-06-05 21:25:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:09,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221787889] [2021-06-05 21:25:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221787889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403998462] [2021-06-05 21:25:09,965 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:10,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:10,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:10,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:10,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:10,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403998462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:10,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:10,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905179629] [2021-06-05 21:25:10,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:10,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,293 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:10,355 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 21:25:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:10,356 INFO L225 Difference]: With dead ends: 103 [2021-06-05 21:25:10,356 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:25:10,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:25:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-06-05 21:25:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-06-05 21:25:10,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-06-05 21:25:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:10,360 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-06-05 21:25:10,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-06-05 21:25:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:10,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:10,361 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:10,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:10,577 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-06-05 21:25:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:10,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395077069] [2021-06-05 21:25:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:10,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:10,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395077069] [2021-06-05 21:25:10,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395077069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345033309] [2021-06-05 21:25:10,613 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:10,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:10,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:10,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:10,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:10,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:10,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345033309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:10,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60018409] [2021-06-05 21:25:10,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,823 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:10,891 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-06-05 21:25:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:10,892 INFO L225 Difference]: With dead ends: 113 [2021-06-05 21:25:10,892 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:25:10,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:25:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-06-05 21:25:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-06-05 21:25:10,902 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-06-05 21:25:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-06-05 21:25:10,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-06-05 21:25:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:10,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:10,905 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:11,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:25:11,123 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-06-05 21:25:11,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:11,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504216615] [2021-06-05 21:25:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:11,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504216615] [2021-06-05 21:25:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504216615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268898486] [2021-06-05 21:25:11,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:11,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:11,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:11,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:11,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:11,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:11,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:11,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:11,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268898486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:11,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38898208] [2021-06-05 21:25:11,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:11,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:11,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:11,525 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:11,598 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-06-05 21:25:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:11,599 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:25:11,599 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:25:11,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:25:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-06-05 21:25:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-06-05 21:25:11,603 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-06-05 21:25:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:11,603 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-06-05 21:25:11,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-06-05 21:25:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:11,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:11,604 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:11,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:11,804 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-06-05 21:25:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469420808] [2021-06-05 21:25:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:11,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:11,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469420808] [2021-06-05 21:25:11,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469420808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687692142] [2021-06-05 21:25:11,840 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:11,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:11,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:11,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:11,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:11,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:11,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:11,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:11,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687692142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:12,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960086461] [2021-06-05 21:25:12,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:12,005 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:12,084 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-06-05 21:25:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:12,085 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:25:12,085 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 21:25:12,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 21:25:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-06-05 21:25:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-06-05 21:25:12,098 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-06-05 21:25:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:12,098 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-06-05 21:25:12,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-06-05 21:25:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:25:12,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:12,102 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:12,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:25:12,314 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-06-05 21:25:12,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:12,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752055944] [2021-06-05 21:25:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:12,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752055944] [2021-06-05 21:25:12,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752055944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568656677] [2021-06-05 21:25:12,354 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:12,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:12,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:25:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:12,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:25:12,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:12,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:12,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:12,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:25:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568656677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:12,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 21:25:12,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455685524] [2021-06-05 21:25:12,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:12,549 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:12,618 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-06-05 21:25:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:12,619 INFO L225 Difference]: With dead ends: 149 [2021-06-05 21:25:12,620 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:25:12,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:25:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-06-05 21:25:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-05 21:25:12,623 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-06-05 21:25:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:12,623 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-05 21:25:12,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-05 21:25:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:12,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:12,623 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:12,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:12,837 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-06-05 21:25:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:12,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118525511] [2021-06-05 21:25:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118525511] [2021-06-05 21:25:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118525511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537593725] [2021-06-05 21:25:12,892 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:12,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:12,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537593725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:12,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:12,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632982529] [2021-06-05 21:25:12,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:12,970 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:13,061 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-06-05 21:25:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:25:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:13,062 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:25:13,062 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 21:25:13,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 21:25:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-06-05 21:25:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-06-05 21:25:13,065 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-06-05 21:25:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:13,065 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-06-05 21:25:13,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-06-05 21:25:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:13,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:13,066 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:13,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 21:25:13,281 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-06-05 21:25:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:13,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283566130] [2021-06-05 21:25:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:13,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:13,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283566130] [2021-06-05 21:25:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283566130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:13,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628062172] [2021-06-05 21:25:13,338 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:13,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628062172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:13,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023366305] [2021-06-05 21:25:13,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:13,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:13,398 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:13,532 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-06-05 21:25:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:25:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:13,533 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:25:13,533 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:25:13,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:25:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-06-05 21:25:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 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) [2021-06-05 21:25:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-06-05 21:25:13,537 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-06-05 21:25:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:13,537 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-06-05 21:25:13,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-06-05 21:25:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:13,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:13,538 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:13,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 21:25:13,753 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-06-05 21:25:13,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:13,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321667976] [2021-06-05 21:25:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:13,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321667976] [2021-06-05 21:25:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321667976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273275340] [2021-06-05 21:25:13,793 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273275340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:13,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250056857] [2021-06-05 21:25:13,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:13,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:13,866 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:13,948 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-06-05 21:25:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:13,951 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:25:13,951 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:25:13,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:25:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-06-05 21:25:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 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) [2021-06-05 21:25:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 21:25:13,955 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 21:25:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:13,956 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 21:25:13,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 21:25:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:13,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:13,956 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:14,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,175 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:14,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-06-05 21:25:14,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:14,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802629429] [2021-06-05 21:25:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:14,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802629429] [2021-06-05 21:25:14,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802629429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671262716] [2021-06-05 21:25:14,219 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671262716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:14,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001766940] [2021-06-05 21:25:14,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:14,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:14,296 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:14,334 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-06-05 21:25:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:14,335 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:25:14,335 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 21:25:14,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 21:25:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-06-05 21:25:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 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) [2021-06-05 21:25:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 21:25:14,338 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 21:25:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:14,338 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 21:25:14,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 21:25:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:14,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:14,339 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:14,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 21:25:14,557 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-06-05 21:25:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:14,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883774248] [2021-06-05 21:25:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:14,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883774248] [2021-06-05 21:25:14,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883774248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866590642] [2021-06-05 21:25:14,596 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:14,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866590642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:14,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:14,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364025296] [2021-06-05 21:25:14,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:14,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:14,669 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:14,728 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-06-05 21:25:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:25:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:14,730 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:25:14,730 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:25:14,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:25:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-06-05 21:25:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-06-05 21:25:14,733 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-06-05 21:25:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:14,733 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-06-05 21:25:14,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-06-05 21:25:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:14,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:14,734 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:14,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,950 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-06-05 21:25:14,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:14,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862818490] [2021-06-05 21:25:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862818490] [2021-06-05 21:25:15,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862818490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910738481] [2021-06-05 21:25:15,009 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:15,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910738481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:15,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985958672] [2021-06-05 21:25:15,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:15,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:15,064 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:15,151 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-06-05 21:25:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:15,161 INFO L225 Difference]: With dead ends: 225 [2021-06-05 21:25:15,162 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:25:15,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:25:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-06-05 21:25:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-05 21:25:15,165 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-06-05 21:25:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:15,165 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-05 21:25:15,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-05 21:25:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:15,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:15,166 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:15,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,381 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-06-05 21:25:15,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:15,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178622435] [2021-06-05 21:25:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178622435] [2021-06-05 21:25:15,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178622435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680939665] [2021-06-05 21:25:15,440 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:15,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680939665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:15,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383505691] [2021-06-05 21:25:15,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:15,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:15,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:15,538 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:15,611 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-06-05 21:25:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:15,612 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:25:15,612 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:25:15,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:25:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-06-05 21:25:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 21:25:15,616 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 21:25:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:15,616 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 21:25:15,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 21:25:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:15,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:15,616 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:15,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,833 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-06-05 21:25:15,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:15,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558872425] [2021-06-05 21:25:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558872425] [2021-06-05 21:25:15,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558872425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921070296] [2021-06-05 21:25:15,877 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:15,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921070296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:15,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:15,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299182147] [2021-06-05 21:25:15,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:15,958 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:15,996 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-06-05 21:25:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:15,998 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:25:15,998 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:25:15,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:25:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 21:25:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 21:25:16,002 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 21:25:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:16,002 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 21:25:16,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 21:25:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:16,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:16,002 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:16,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:16,221 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:16,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:16,222 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-06-05 21:25:16,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:16,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108566482] [2021-06-05 21:25:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108566482] [2021-06-05 21:25:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108566482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842718147] [2021-06-05 21:25:16,262 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842718147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:16,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:16,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50702715] [2021-06-05 21:25:16,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:16,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:16,328 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:16,417 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-06-05 21:25:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:16,418 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:25:16,419 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:25:16,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:25:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-06-05 21:25:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 21:25:16,422 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 21:25:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:16,422 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 21:25:16,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 21:25:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:16,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:16,422 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:16,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:25:16,637 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-06-05 21:25:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:16,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680441577] [2021-06-05 21:25:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680441577] [2021-06-05 21:25:16,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680441577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66516526] [2021-06-05 21:25:16,683 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:16,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66516526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:16,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246259282] [2021-06-05 21:25:16,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:16,811 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:16,883 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-06-05 21:25:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:16,885 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:25:16,885 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:25:16,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:25:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-06-05 21:25:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 21:25:16,888 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 21:25:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:16,888 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 21:25:16,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 21:25:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:16,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:16,889 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:17,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 21:25:17,105 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-06-05 21:25:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:17,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847209435] [2021-06-05 21:25:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:17,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847209435] [2021-06-05 21:25:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847209435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274657566] [2021-06-05 21:25:17,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:17,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274657566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:17,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:17,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739600849] [2021-06-05 21:25:17,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:17,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:17,204 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:17,250 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-06-05 21:25:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:25:17,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:17,251 INFO L225 Difference]: With dead ends: 230 [2021-06-05 21:25:17,251 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:25:17,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:25:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-06-05 21:25:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-06-05 21:25:17,254 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-06-05 21:25:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:17,254 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-06-05 21:25:17,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-06-05 21:25:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:17,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:17,255 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:17,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,465 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-06-05 21:25:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:17,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850827091] [2021-06-05 21:25:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:17,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850827091] [2021-06-05 21:25:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850827091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211227186] [2021-06-05 21:25:17,496 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211227186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:17,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:17,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101686124] [2021-06-05 21:25:17,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:17,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:17,553 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:17,640 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-06-05 21:25:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:17,641 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:25:17,641 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:25:17,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:25:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-06-05 21:25:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-06-05 21:25:17,645 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-06-05 21:25:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:17,645 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-06-05 21:25:17,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-06-05 21:25:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:17,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:17,645 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:17,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 21:25:17,861 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-06-05 21:25:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:17,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131979894] [2021-06-05 21:25:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131979894] [2021-06-05 21:25:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131979894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472082303] [2021-06-05 21:25:17,904 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:17,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:17,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:17,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472082303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:17,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:17,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805777038] [2021-06-05 21:25:17,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:17,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:17,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:17,962 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:18,046 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-06-05 21:25:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:18,047 INFO L225 Difference]: With dead ends: 229 [2021-06-05 21:25:18,047 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:25:18,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:25:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-06-05 21:25:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 21:25:18,050 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 21:25:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:18,050 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 21:25:18,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 21:25:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:18,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:18,051 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:18,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:18,265 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-06-05 21:25:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:18,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373063352] [2021-06-05 21:25:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373063352] [2021-06-05 21:25:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373063352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346178110] [2021-06-05 21:25:18,308 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:18,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:18,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346178110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:18,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:18,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659520300] [2021-06-05 21:25:18,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:18,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:18,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:18,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:18,375 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:18,420 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-06-05 21:25:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:18,421 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:25:18,421 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:25:18,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:25:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-06-05 21:25:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 21:25:18,424 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 21:25:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:18,425 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 21:25:18,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 21:25:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:18,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:18,425 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:18,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 21:25:18,640 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-06-05 21:25:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:18,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952585832] [2021-06-05 21:25:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952585832] [2021-06-05 21:25:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952585832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122653756] [2021-06-05 21:25:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122653756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:18,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619148675] [2021-06-05 21:25:18,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:18,729 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:18,832 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-06-05 21:25:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:18,833 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:25:18,833 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:25:18,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:25:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-06-05 21:25:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 21:25:18,836 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 21:25:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:18,836 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 21:25:18,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 21:25:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:18,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:18,837 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:19,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,048 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-06-05 21:25:19,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:19,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600232760] [2021-06-05 21:25:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:19,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600232760] [2021-06-05 21:25:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600232760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158757555] [2021-06-05 21:25:19,146 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:19,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158757555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:19,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:19,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833926488] [2021-06-05 21:25:19,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:19,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:19,212 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:19,277 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-06-05 21:25:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:19,284 INFO L225 Difference]: With dead ends: 257 [2021-06-05 21:25:19,285 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 21:25:19,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 21:25:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-06-05 21:25:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 21:25:19,288 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 21:25:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:19,288 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 21:25:19,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 21:25:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:19,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:19,289 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,505 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-06-05 21:25:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:19,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310506307] [2021-06-05 21:25:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:19,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310506307] [2021-06-05 21:25:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310506307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938333488] [2021-06-05 21:25:19,541 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:25:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:19,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938333488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:19,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 21:25:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960451248] [2021-06-05 21:25:19,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:25:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:25:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:19,656 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:19,938 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-06-05 21:25:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:25:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:19,940 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:25:19,940 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:25:19,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:25:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:25:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-06-05 21:25:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-06-05 21:25:19,944 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-06-05 21:25:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:19,944 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-06-05 21:25:19,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-06-05 21:25:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:19,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:19,944 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:20,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,160 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:20,160 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-06-05 21:25:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:20,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608922391] [2021-06-05 21:25:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:20,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608922391] [2021-06-05 21:25:20,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608922391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531454132] [2021-06-05 21:25:20,209 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:20,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531454132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:20,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922286878] [2021-06-05 21:25:20,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:20,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:20,283 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:20,372 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-06-05 21:25:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:20,374 INFO L225 Difference]: With dead ends: 353 [2021-06-05 21:25:20,374 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 21:25:20,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 21:25:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-06-05 21:25:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-06-05 21:25:20,378 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-06-05 21:25:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:20,378 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-06-05 21:25:20,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-06-05 21:25:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:20,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:20,378 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:20,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,588 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-06-05 21:25:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:20,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981401839] [2021-06-05 21:25:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:20,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981401839] [2021-06-05 21:25:20,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981401839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603975341] [2021-06-05 21:25:20,631 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:20,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603975341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:20,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823953852] [2021-06-05 21:25:20,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:20,683 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:20,777 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-06-05 21:25:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:20,779 INFO L225 Difference]: With dead ends: 342 [2021-06-05 21:25:20,779 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 21:25:20,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 21:25:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-06-05 21:25:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 21:25:20,783 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 21:25:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:20,783 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 21:25:20,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 21:25:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:20,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:20,784 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:20,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,997 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-06-05 21:25:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336589360] [2021-06-05 21:25:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336589360] [2021-06-05 21:25:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336589360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941221145] [2021-06-05 21:25:21,032 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:21,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:21,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941221145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:21,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:21,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304502409] [2021-06-05 21:25:21,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:21,088 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:21,119 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-06-05 21:25:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:21,120 INFO L225 Difference]: With dead ends: 348 [2021-06-05 21:25:21,120 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 21:25:21,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 21:25:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-06-05 21:25:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 21:25:21,124 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 21:25:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:21,124 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 21:25:21,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 21:25:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:21,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:21,125 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:21,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 21:25:21,333 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-06-05 21:25:21,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:21,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914963731] [2021-06-05 21:25:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:21,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914963731] [2021-06-05 21:25:21,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914963731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252494879] [2021-06-05 21:25:21,365 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252494879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:21,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:21,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191219573] [2021-06-05 21:25:21,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:21,438 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:21,496 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-06-05 21:25:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:21,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:21,497 INFO L225 Difference]: With dead ends: 362 [2021-06-05 21:25:21,497 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 21:25:21,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 21:25:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-06-05 21:25:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 21:25:21,501 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 21:25:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:21,501 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 21:25:21,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 21:25:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:21,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:21,502 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:21,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 21:25:21,717 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-06-05 21:25:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:21,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437155328] [2021-06-05 21:25:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:21,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437155328] [2021-06-05 21:25:21,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437155328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008323827] [2021-06-05 21:25:21,752 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:21,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:21,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:21,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008323827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:21,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442579935] [2021-06-05 21:25:21,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:21,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:21,823 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:21,893 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-06-05 21:25:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:21,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:21,895 INFO L225 Difference]: With dead ends: 346 [2021-06-05 21:25:21,895 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 21:25:21,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 21:25:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-06-05 21:25:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 21:25:21,899 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 21:25:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:21,899 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 21:25:21,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 21:25:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:21,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:21,900 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:22,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 21:25:22,113 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-06-05 21:25:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:22,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135210595] [2021-06-05 21:25:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:22,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135210595] [2021-06-05 21:25:22,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135210595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107782458] [2021-06-05 21:25:22,165 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:22,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107782458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:22,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361655845] [2021-06-05 21:25:22,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:22,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:22,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:22,232 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:22,350 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-06-05 21:25:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:22,352 INFO L225 Difference]: With dead ends: 402 [2021-06-05 21:25:22,352 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 21:25:22,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 21:25:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-05 21:25:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-06-05 21:25:22,361 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-06-05 21:25:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:22,361 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-06-05 21:25:22,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-06-05 21:25:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:22,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:22,364 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:22,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 21:25:22,573 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-06-05 21:25:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:22,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206007782] [2021-06-05 21:25:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:22,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206007782] [2021-06-05 21:25:22,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206007782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442000498] [2021-06-05 21:25:22,612 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:22,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442000498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:22,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:22,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667537908] [2021-06-05 21:25:22,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:22,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:22,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:22,666 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:22,759 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-06-05 21:25:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:22,762 INFO L225 Difference]: With dead ends: 396 [2021-06-05 21:25:22,762 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 21:25:22,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 21:25:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-06-05 21:25:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-06-05 21:25:22,767 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-06-05 21:25:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:22,767 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-06-05 21:25:22,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-06-05 21:25:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:22,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:22,768 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:22,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:22,977 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-06-05 21:25:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385614157] [2021-06-05 21:25:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:23,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385614157] [2021-06-05 21:25:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385614157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940909627] [2021-06-05 21:25:23,035 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:23,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:23,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940909627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:23,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:23,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963678278] [2021-06-05 21:25:23,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:23,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:23,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:23,113 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:23,159 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-06-05 21:25:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:23,161 INFO L225 Difference]: With dead ends: 394 [2021-06-05 21:25:23,161 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 21:25:23,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 21:25:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-06-05 21:25:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-06-05 21:25:23,165 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-06-05 21:25:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:23,165 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-06-05 21:25:23,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-06-05 21:25:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:23,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:23,166 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:23,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 21:25:23,381 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-06-05 21:25:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:23,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838896901] [2021-06-05 21:25:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:23,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838896901] [2021-06-05 21:25:23,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838896901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440290080] [2021-06-05 21:25:23,414 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:25:23,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:23,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:23,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440290080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957956133] [2021-06-05 21:25:23,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:23,490 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:23,548 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-06-05 21:25:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:23,550 INFO L225 Difference]: With dead ends: 402 [2021-06-05 21:25:23,550 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 21:25:23,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 21:25:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-06-05 21:25:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 21:25:23,554 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 21:25:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:23,555 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 21:25:23,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 21:25:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:23,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:23,555 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:23,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 21:25:23,772 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-06-05 21:25:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:23,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139139093] [2021-06-05 21:25:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139139093] [2021-06-05 21:25:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139139093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081321670] [2021-06-05 21:25:23,806 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081321670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:23,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:23,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989023655] [2021-06-05 21:25:23,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:23,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:23,905 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:23,975 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-06-05 21:25:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:23,977 INFO L225 Difference]: With dead ends: 379 [2021-06-05 21:25:23,977 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 21:25:23,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 21:25:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-06-05 21:25:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 21:25:23,981 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 21:25:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 21:25:23,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 21:25:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:23,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:23,982 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:24,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:24,197 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:24,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-06-05 21:25:24,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:24,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560927633] [2021-06-05 21:25:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560927633] [2021-06-05 21:25:24,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560927633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246832696] [2021-06-05 21:25:24,248 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:24,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:24,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246832696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:24,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091373223] [2021-06-05 21:25:24,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:24,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:24,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:24,305 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:24,420 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-06-05 21:25:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:24,421 INFO L225 Difference]: With dead ends: 381 [2021-06-05 21:25:24,422 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 21:25:24,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 21:25:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-06-05 21:25:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 21:25:24,426 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 21:25:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:24,426 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 21:25:24,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 21:25:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:24,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:24,427 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:24,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:24,643 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-06-05 21:25:24,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:24,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809129370] [2021-06-05 21:25:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:24,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809129370] [2021-06-05 21:25:24,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809129370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186898063] [2021-06-05 21:25:24,691 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:24,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186898063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:25:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521522951] [2021-06-05 21:25:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:24,748 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:24,894 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-06-05 21:25:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:24,903 INFO L225 Difference]: With dead ends: 438 [2021-06-05 21:25:24,903 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 21:25:24,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 21:25:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 21:25:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 21:25:24,908 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-06-05 21:25:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:24,908 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 21:25:24,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 21:25:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:24,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:24,909 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:25,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,125 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-06-05 21:25:25,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:25,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068436531] [2021-06-05 21:25:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068436531] [2021-06-05 21:25:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068436531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536566149] [2021-06-05 21:25:25,169 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:25,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536566149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:25,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:25:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258975916] [2021-06-05 21:25:25,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:25,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:25,227 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:25,344 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-06-05 21:25:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:25,354 INFO L225 Difference]: With dead ends: 446 [2021-06-05 21:25:25,354 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 21:25:25,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 21:25:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-06-05 21:25:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 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) [2021-06-05 21:25:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-06-05 21:25:25,359 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-06-05 21:25:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:25,359 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-06-05 21:25:25,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-06-05 21:25:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:25,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:25,360 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:25,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,576 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-06-05 21:25:25,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:25,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708214080] [2021-06-05 21:25:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:25,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708214080] [2021-06-05 21:25:25,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708214080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929051288] [2021-06-05 21:25:25,615 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:25,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929051288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:25,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:25:25,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22601568] [2021-06-05 21:25:25,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:25,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:25,669 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:25,742 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-06-05 21:25:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:25,744 INFO L225 Difference]: With dead ends: 432 [2021-06-05 21:25:25,744 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 21:25:25,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 21:25:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-06-05 21:25:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 21:25:25,749 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-06-05 21:25:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:25,749 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 21:25:25,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 21:25:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:25,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:25,750 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:25,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,961 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-06-05 21:25:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:25,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421698729] [2021-06-05 21:25:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421698729] [2021-06-05 21:25:26,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421698729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757213437] [2021-06-05 21:25:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:26,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:26,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757213437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:26,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:25:26,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722167297] [2021-06-05 21:25:26,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:26,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:26,092 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:26,195 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-06-05 21:25:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:26,196 INFO L225 Difference]: With dead ends: 438 [2021-06-05 21:25:26,196 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 21:25:26,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 21:25:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-06-05 21:25:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-06-05 21:25:26,201 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-06-05 21:25:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:26,201 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-06-05 21:25:26,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-06-05 21:25:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:26,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:26,202 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:26,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 21:25:26,417 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-06-05 21:25:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:26,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718747476] [2021-06-05 21:25:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718747476] [2021-06-05 21:25:26,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718747476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486781538] [2021-06-05 21:25:26,460 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486781538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:26,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:25:26,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497798213] [2021-06-05 21:25:26,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:26,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:26,538 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:26,684 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-06-05 21:25:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:25:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:26,686 INFO L225 Difference]: With dead ends: 417 [2021-06-05 21:25:26,686 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 21:25:26,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 21:25:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-06-05 21:25:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 21:25:26,691 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-06-05 21:25:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:26,691 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 21:25:26,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 21:25:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:26,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:26,692 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:26,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 21:25:26,901 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-06-05 21:25:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:26,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222038592] [2021-06-05 21:25:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222038592] [2021-06-05 21:25:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222038592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511234797] [2021-06-05 21:25:26,942 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:25:26,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:26,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511234797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:27,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:25:27,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927575414] [2021-06-05 21:25:27,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:27,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:27,010 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:27,142 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-06-05 21:25:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:25:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:27,143 INFO L225 Difference]: With dead ends: 404 [2021-06-05 21:25:27,143 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 21:25:27,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 21:25:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-06-05 21:25:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-06-05 21:25:27,148 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-06-05 21:25:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:27,148 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-06-05 21:25:27,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-06-05 21:25:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:27,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:27,149 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:27,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:27,364 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-06-05 21:25:27,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:27,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040647888] [2021-06-05 21:25:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:27,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040647888] [2021-06-05 21:25:27,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040647888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694637234] [2021-06-05 21:25:27,418 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:27,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694637234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:27,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:25:27,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830890313] [2021-06-05 21:25:27,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:27,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:27,484 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:27,624 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-06-05 21:25:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:27,626 INFO L225 Difference]: With dead ends: 408 [2021-06-05 21:25:27,626 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 21:25:27,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 21:25:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-06-05 21:25:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-06-05 21:25:27,630 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-06-05 21:25:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:27,631 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-06-05 21:25:27,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-06-05 21:25:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:25:27,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:27,631 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:27,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 21:25:27,847 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-06-05 21:25:27,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:27,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553817316] [2021-06-05 21:25:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:27,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553817316] [2021-06-05 21:25:27,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553817316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851294133] [2021-06-05 21:25:27,899 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:27,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851294133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:27,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:25:27,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022066470] [2021-06-05 21:25:27,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:27,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:27,982 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,162 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-06-05 21:25:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:25:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:28,164 INFO L225 Difference]: With dead ends: 465 [2021-06-05 21:25:28,164 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 21:25:28,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 21:25:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-06-05 21:25:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-06-05 21:25:28,169 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-06-05 21:25:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:28,169 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-06-05 21:25:28,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-06-05 21:25:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:28,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:28,170 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:28,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:28,386 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-06-05 21:25:28,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:28,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874866449] [2021-06-05 21:25:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:28,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:28,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874866449] [2021-06-05 21:25:28,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874866449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343131791] [2021-06-05 21:25:28,419 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:25:28,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:28,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:28,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:28,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343131791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:28,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:25:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906187490] [2021-06-05 21:25:28,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:28,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:28,483 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,520 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-06-05 21:25:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:25:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:28,522 INFO L225 Difference]: With dead ends: 414 [2021-06-05 21:25:28,522 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 21:25:28,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 21:25:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 21:25:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-06-05 21:25:28,529 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-06-05 21:25:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:28,529 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-06-05 21:25:28,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-06-05 21:25:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:28,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:28,530 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:28,744 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-06-05 21:25:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533313779] [2021-06-05 21:25:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:28,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533313779] [2021-06-05 21:25:28,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533313779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762872501] [2021-06-05 21:25:28,792 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:28,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:28,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:28,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762872501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:28,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 21:25:28,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343476000] [2021-06-05 21:25:28,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:28,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:28,846 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,936 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-06-05 21:25:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:28,937 INFO L225 Difference]: With dead ends: 409 [2021-06-05 21:25:28,937 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 21:25:28,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 21:25:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 21:25:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 21:25:28,941 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-06-05 21:25:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:28,942 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 21:25:28,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 21:25:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:28,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:28,942 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:29,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:29,158 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-06-05 21:25:29,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:29,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123841486] [2021-06-05 21:25:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:29,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123841486] [2021-06-05 21:25:29,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123841486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154646329] [2021-06-05 21:25:29,196 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:25:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:29,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154646329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:29,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:29,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14212445] [2021-06-05 21:25:29,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:29,279 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:29,375 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-06-05 21:25:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:29,377 INFO L225 Difference]: With dead ends: 414 [2021-06-05 21:25:29,377 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 21:25:29,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 21:25:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-06-05 21:25:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 21:25:29,386 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-06-05 21:25:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:29,386 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 21:25:29,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 21:25:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:29,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:29,387 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:29,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:29,601 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-06-05 21:25:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:29,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928820322] [2021-06-05 21:25:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:29,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928820322] [2021-06-05 21:25:29,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928820322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296952981] [2021-06-05 21:25:29,656 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:29,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:29,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296952981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:29,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:29,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216843819] [2021-06-05 21:25:29,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:29,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:29,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:29,723 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:29,791 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-06-05 21:25:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:29,792 INFO L225 Difference]: With dead ends: 367 [2021-06-05 21:25:29,792 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 21:25:29,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 21:25:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-06-05 21:25:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-06-05 21:25:29,796 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-06-05 21:25:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:29,796 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-06-05 21:25:29,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-06-05 21:25:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:29,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:29,797 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:30,013 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-06-05 21:25:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614382936] [2021-06-05 21:25:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614382936] [2021-06-05 21:25:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614382936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966358434] [2021-06-05 21:25:30,054 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:30,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:30,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966358434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:30,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:25:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260938160] [2021-06-05 21:25:30,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:30,106 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:30,163 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-06-05 21:25:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:30,164 INFO L225 Difference]: With dead ends: 355 [2021-06-05 21:25:30,164 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 21:25:30,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 21:25:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-05 21:25:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-06-05 21:25:30,168 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-06-05 21:25:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:30,168 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-06-05 21:25:30,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-06-05 21:25:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:30,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:30,169 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:30,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:30,385 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-06-05 21:25:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:30,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144773415] [2021-06-05 21:25:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:30,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144773415] [2021-06-05 21:25:30,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144773415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312806109] [2021-06-05 21:25:30,429 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:30,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:30,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312806109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:30,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:25:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008273380] [2021-06-05 21:25:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:25:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:25:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:25:30,488 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:30,525 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-06-05 21:25:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:30,526 INFO L225 Difference]: With dead ends: 443 [2021-06-05 21:25:30,526 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 21:25:30,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 21:25:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-06-05 21:25:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-06-05 21:25:30,534 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-06-05 21:25:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:30,534 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-06-05 21:25:30,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-06-05 21:25:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:30,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:30,535 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:30,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 21:25:30,749 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-06-05 21:25:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:30,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576644489] [2021-06-05 21:25:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:30,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576644489] [2021-06-05 21:25:30,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576644489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286012397] [2021-06-05 21:25:30,790 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:30,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:30,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:30,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286012397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:30,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:25:30,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813428357] [2021-06-05 21:25:30,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:30,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:30,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:30,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:30,843 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:30,885 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-06-05 21:25:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:25:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:30,886 INFO L225 Difference]: With dead ends: 430 [2021-06-05 21:25:30,886 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 21:25:30,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 21:25:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 21:25:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-06-05 21:25:30,891 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-06-05 21:25:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:30,891 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-06-05 21:25:30,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-06-05 21:25:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:30,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:30,891 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:31,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 21:25:31,107 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-06-05 21:25:31,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:31,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506763749] [2021-06-05 21:25:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:31,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506763749] [2021-06-05 21:25:31,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506763749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310320947] [2021-06-05 21:25:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:31,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:31,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310320947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:31,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 21:25:31,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961928007] [2021-06-05 21:25:31,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:31,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:31,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:31,212 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:31,305 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-06-05 21:25:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:31,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:31,307 INFO L225 Difference]: With dead ends: 428 [2021-06-05 21:25:31,307 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 21:25:31,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 21:25:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-06-05 21:25:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-05 21:25:31,311 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-06-05 21:25:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:31,311 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-05 21:25:31,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-05 21:25:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:31,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:31,312 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:31,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 21:25:31,513 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-06-05 21:25:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:31,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3750054] [2021-06-05 21:25:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3750054] [2021-06-05 21:25:31,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3750054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751710101] [2021-06-05 21:25:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:31,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751710101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:31,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:31,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059902348] [2021-06-05 21:25:31,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:31,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:31,618 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:31,729 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-06-05 21:25:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:31,730 INFO L225 Difference]: With dead ends: 433 [2021-06-05 21:25:31,730 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 21:25:31,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 21:25:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 21:25:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-05 21:25:31,734 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-06-05 21:25:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-05 21:25:31,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-05 21:25:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:31,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:31,735 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:31,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:25:31,951 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-06-05 21:25:31,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:31,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563375390] [2021-06-05 21:25:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563375390] [2021-06-05 21:25:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563375390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595789581] [2021-06-05 21:25:31,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:32,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595789581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:32,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58389205] [2021-06-05 21:25:32,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:32,049 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:32,118 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-06-05 21:25:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:32,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:32,120 INFO L225 Difference]: With dead ends: 386 [2021-06-05 21:25:32,120 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 21:25:32,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 21:25:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-06-05 21:25:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-06-05 21:25:32,123 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-06-05 21:25:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,124 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-06-05 21:25:32,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-06-05 21:25:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:32,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,124 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:32,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,341 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-06-05 21:25:32,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:32,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226227335] [2021-06-05 21:25:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:32,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226227335] [2021-06-05 21:25:32,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226227335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072595257] [2021-06-05 21:25:32,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072595257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:32,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:25:32,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828241718] [2021-06-05 21:25:32,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:32,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:32,458 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:32,543 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-06-05 21:25:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:32,544 INFO L225 Difference]: With dead ends: 385 [2021-06-05 21:25:32,544 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 21:25:32,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 21:25:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-06-05 21:25:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-06-05 21:25:32,548 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-06-05 21:25:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,548 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-06-05 21:25:32,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-06-05 21:25:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:32,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,548 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:32,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 21:25:32,758 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-06-05 21:25:32,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:32,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474548363] [2021-06-05 21:25:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:32,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:32,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474548363] [2021-06-05 21:25:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474548363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482311407] [2021-06-05 21:25:32,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:32,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482311407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:32,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753738612] [2021-06-05 21:25:32,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:32,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:32,896 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:32,967 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-06-05 21:25:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:32,968 INFO L225 Difference]: With dead ends: 372 [2021-06-05 21:25:32,968 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 21:25:32,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 21:25:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-06-05 21:25:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-06-05 21:25:32,973 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-06-05 21:25:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-06-05 21:25:32,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-06-05 21:25:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:32,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,974 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:33,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:33,181 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-06-05 21:25:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101791177] [2021-06-05 21:25:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101791177] [2021-06-05 21:25:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101791177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710274692] [2021-06-05 21:25:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:33,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:33,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:33,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:33,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710274692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:33,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 21:25:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063482401] [2021-06-05 21:25:33,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:33,285 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:33,347 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-06-05 21:25:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:33,349 INFO L225 Difference]: With dead ends: 518 [2021-06-05 21:25:33,349 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 21:25:33,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 21:25:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-06-05 21:25:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-06-05 21:25:33,354 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-06-05 21:25:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-06-05 21:25:33,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-06-05 21:25:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:33,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:33,355 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:33,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 21:25:33,555 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-06-05 21:25:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:33,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137041469] [2021-06-05 21:25:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137041469] [2021-06-05 21:25:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137041469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498368809] [2021-06-05 21:25:33,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:33,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:33,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498368809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:33,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:25:33,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382449469] [2021-06-05 21:25:33,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:33,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:33,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:33,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:33,663 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:33,749 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-06-05 21:25:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:33,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:33,758 INFO L225 Difference]: With dead ends: 496 [2021-06-05 21:25:33,758 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 21:25:33,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 21:25:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-06-05 21:25:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 21:25:33,764 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-06-05 21:25:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:33,765 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 21:25:33,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 21:25:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:33,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:33,765 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:33,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:33,977 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-06-05 21:25:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434589977] [2021-06-05 21:25:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434589977] [2021-06-05 21:25:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434589977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206007002] [2021-06-05 21:25:34,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:34,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206007002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:34,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 21:25:34,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429007964] [2021-06-05 21:25:34,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:34,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:34,098 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:34,203 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-06-05 21:25:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:34,205 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:25:34,205 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 21:25:34,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 21:25:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-05 21:25:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-06-05 21:25:34,210 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-06-05 21:25:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:34,210 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-06-05 21:25:34,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-06-05 21:25:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:34,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:34,211 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:34,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,421 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:34,421 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-06-05 21:25:34,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:34,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659655042] [2021-06-05 21:25:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659655042] [2021-06-05 21:25:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659655042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504354163] [2021-06-05 21:25:34,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:34,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504354163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:34,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 21:25:34,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668439878] [2021-06-05 21:25:34,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:34,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:34,539 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:34,627 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-06-05 21:25:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:34,628 INFO L225 Difference]: With dead ends: 453 [2021-06-05 21:25:34,628 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 21:25:34,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 21:25:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-06-05 21:25:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-06-05 21:25:34,632 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-06-05 21:25:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:34,633 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-06-05 21:25:34,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-06-05 21:25:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:34,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:34,633 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:34,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,841 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-06-05 21:25:34,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:34,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579324961] [2021-06-05 21:25:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:34,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579324961] [2021-06-05 21:25:34,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579324961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839794487] [2021-06-05 21:25:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:34,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:25:34,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839794487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:34,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 21:25:34,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809129716] [2021-06-05 21:25:34,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:34,947 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:35,037 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-06-05 21:25:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:25:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:35,038 INFO L225 Difference]: With dead ends: 450 [2021-06-05 21:25:35,038 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 21:25:35,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 21:25:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-06-05 21:25:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-06-05 21:25:35,043 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-06-05 21:25:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,043 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-06-05 21:25:35,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-06-05 21:25:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:35,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,044 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 21:25:35,249 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-06-05 21:25:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227298039] [2021-06-05 21:25:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227298039] [2021-06-05 21:25:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227298039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113192698] [2021-06-05 21:25:35,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:35,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:35,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113192698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:35,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 21:25:35,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798189968] [2021-06-05 21:25:35,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:35,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:35,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:35,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:35,448 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:35,535 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-06-05 21:25:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:35,536 INFO L225 Difference]: With dead ends: 444 [2021-06-05 21:25:35,536 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 21:25:35,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 21:25:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-06-05 21:25:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-06-05 21:25:35,540 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-06-05 21:25:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,540 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-06-05 21:25:35,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-06-05 21:25:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:25:35,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,541 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:35,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 21:25:35,742 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-06-05 21:25:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:35,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417138888] [2021-06-05 21:25:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:35,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:35,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417138888] [2021-06-05 21:25:35,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417138888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981789226] [2021-06-05 21:25:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:35,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:35,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:25:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981789226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:35,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 21:25:35,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108644177] [2021-06-05 21:25:35,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:35,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:35,858 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:35,960 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-06-05 21:25:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 21:25:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:35,961 INFO L225 Difference]: With dead ends: 435 [2021-06-05 21:25:35,961 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 21:25:35,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 21:25:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-06-05 21:25:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-06-05 21:25:35,967 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-06-05 21:25:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-06-05 21:25:35,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-06-05 21:25:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:25:35,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,968 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:36,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 21:25:36,169 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-06-05 21:25:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:36,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525370824] [2021-06-05 21:25:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:36,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525370824] [2021-06-05 21:25:36,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525370824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700653860] [2021-06-05 21:25:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:36,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:25:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:36,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700653860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:36,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:25:36,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113140994] [2021-06-05 21:25:36,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:25:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:25:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:36,394 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:36,490 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-06-05 21:25:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:25:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:36,491 INFO L225 Difference]: With dead ends: 721 [2021-06-05 21:25:36,491 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 21:25:36,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 21:25:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-06-05 21:25:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-06-05 21:25:36,498 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-06-05 21:25:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:36,498 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-06-05 21:25:36,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-06-05 21:25:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:25:36,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:36,498 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:36,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 21:25:36,699 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-06-05 21:25:36,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:36,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108248417] [2021-06-05 21:25:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108248417] [2021-06-05 21:25:36,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108248417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446110103] [2021-06-05 21:25:36,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:25:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446110103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:36,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:25:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133745474] [2021-06-05 21:25:36,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:25:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:25:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:36,922 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:37,034 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-06-05 21:25:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:25:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:25:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:37,036 INFO L225 Difference]: With dead ends: 819 [2021-06-05 21:25:37,036 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 21:25:37,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 21:25:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-06-05 21:25:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-06-05 21:25:37,043 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-06-05 21:25:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:37,043 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-06-05 21:25:37,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-06-05 21:25:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:37,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:37,044 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:37,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 21:25:37,244 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-06-05 21:25:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:37,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302276381] [2021-06-05 21:25:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:37,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302276381] [2021-06-05 21:25:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302276381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859728383] [2021-06-05 21:25:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:37,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:25:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859728383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:37,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:37,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:25:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906711446] [2021-06-05 21:25:37,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:25:37,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:25:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:37,521 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:37,683 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-06-05 21:25:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:37,685 INFO L225 Difference]: With dead ends: 928 [2021-06-05 21:25:37,685 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 21:25:37,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 21:25:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-06-05 21:25:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-06-05 21:25:37,693 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-06-05 21:25:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:37,693 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-06-05 21:25:37,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-06-05 21:25:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:37,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:37,694 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:37,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:37,895 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-06-05 21:25:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:37,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989314559] [2021-06-05 21:25:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989314559] [2021-06-05 21:25:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989314559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757630531] [2021-06-05 21:25:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:38,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:38,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:25:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:38,390 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:25:38,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:25:39,595 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 262 [2021-06-05 21:25:39,719 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-06-05 21:25:39,956 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-06-05 21:25:40,248 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-06-05 21:25:41,342 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 222 [2021-06-05 21:25:41,639 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-06-05 21:25:42,159 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 21:25:42,680 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 21:25:43,331 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-06-05 21:25:44,333 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-06-05 21:25:44,781 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-06-05 21:25:45,510 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-06-05 21:25:45,684 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-06-05 21:25:45,878 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-06-05 21:25:46,025 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-06-05 21:25:46,992 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-06-05 21:25:47,162 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-06-05 21:25:47,394 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-06-05 21:25:48,288 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-06-05 21:25:48,781 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-06-05 21:25:49,305 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-06-05 21:25:49,547 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-06-05 21:25:49,709 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-06-05 21:25:49,906 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-06-05 21:25:50,683 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-06-05 21:25:50,873 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-06-05 21:25:52,193 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-06-05 21:25:52,668 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-06-05 21:25:53,352 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-06-05 21:25:54,644 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-06-05 21:25:54,792 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-06-05 21:25:54,918 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-06-05 21:25:56,154 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-06-05 21:25:56,320 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-06-05 21:25:56,623 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-06-05 21:25:57,483 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-06-05 21:25:58,627 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-06-05 21:25:58,882 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-06-05 21:25:59,345 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-06-05 21:26:00,126 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-06-05 21:26:01,104 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-06-05 21:26:03,284 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-06-05 21:26:03,402 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-06-05 21:26:03,612 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-06-05 21:26:03,774 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-06-05 21:26:05,259 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-06-05 21:26:05,505 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-06-05 21:26:05,866 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-06-05 21:26:06,329 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-06-05 21:26:06,871 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-06-05 21:26:07,088 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-06-05 21:26:08,672 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-06-05 21:26:08,887 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-06-05 21:26:09,227 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-06-05 21:26:09,690 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-06-05 21:26:10,283 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-06-05 21:26:11,567 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-06-05 21:26:12,800 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-06-05 21:26:12,942 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-06-05 21:26:13,163 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-06-05 21:26:13,434 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-06-05 21:26:14,127 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 256 [2021-06-05 21:26:14,504 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-06-05 21:26:15,209 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-06-05 21:26:15,379 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-06-05 21:26:15,715 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-06-05 21:26:16,138 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-06-05 21:26:16,670 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-06-05 21:26:17,654 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-06-05 21:26:18,998 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-06-05 21:26:21,318 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-06-05 21:26:26,166 WARN L205 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-06-05 21:26:31,840 WARN L205 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-06-05 21:26:38,323 WARN L205 SmtUtils]: Spent 6.47 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-06-05 21:26:45,904 WARN L205 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 21:26:53,510 WARN L205 SmtUtils]: Spent 7.59 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 21:27:01,989 WARN L205 SmtUtils]: Spent 8.47 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-06-05 21:27:02,292 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-06-05 21:27:09,783 WARN L205 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-06-05 21:27:13,746 WARN L205 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-06-05 21:27:17,315 WARN L205 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-06-05 21:27:17,427 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1251 [2021-06-05 21:27:17,715 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-06-05 21:27:18,467 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-06-05 21:27:19,011 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-06-05 21:27:19,839 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-06-05 21:27:20,534 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-06-05 21:27:21,422 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-06-05 21:27:22,457 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-06-05 21:27:23,805 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-06-05 21:27:24,572 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-06-05 21:27:25,199 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-06-05 21:27:26,690 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-06-05 21:27:27,060 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-06-05 21:27:27,571 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-06-05 21:27:28,127 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-06-05 21:27:28,726 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-06-05 21:27:30,419 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-06-05 21:27:32,220 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-06-05 21:27:33,034 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-06-05 21:27:34,133 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-06-05 21:27:34,311 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-06-05 21:27:34,614 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-06-05 21:27:35,542 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-06-05 21:27:35,740 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-06-05 21:27:36,013 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-06-05 21:27:36,481 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-06-05 21:27:36,982 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-06-05 21:27:37,093 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-06-05 21:27:37,655 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-06-05 21:27:38,234 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 218 [2021-06-05 21:27:38,698 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-06-05 21:27:39,789 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-06-05 21:27:40,195 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-06-05 21:27:40,690 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-06-05 21:27:41,207 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-06-05 21:27:42,076 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-06-05 21:27:44,708 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-06-05 21:27:47,598 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-06-05 21:27:47,789 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-06-05 21:27:48,067 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-06-05 21:27:49,363 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-06-05 21:27:49,927 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-06-05 21:27:50,437 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-06-05 21:27:50,689 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-06-05 21:27:51,254 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-06-05 21:27:51,429 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-06-05 21:27:51,900 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-06-05 21:27:52,632 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-06-05 21:27:52,880 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-06-05 21:27:53,521 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-06-05 21:27:54,487 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-06-05 21:27:55,365 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-06-05 21:27:56,494 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-06-05 21:27:56,841 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-06-05 21:27:57,357 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-06-05 21:27:57,983 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-06-05 21:27:58,185 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-06-05 21:27:58,487 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-06-05 21:27:58,757 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-06-05 21:27:59,061 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-06-05 21:27:59,304 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-06-05 21:28:00,217 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-06-05 21:28:00,565 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-06-05 21:28:01,594 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-06-05 21:28:01,834 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-06-05 21:28:02,264 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-06-05 21:28:03,840 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-06-05 21:28:08,374 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 21:28:12,884 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 21:28:19,339 WARN L205 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-06-05 21:28:19,890 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-06-05 21:28:20,702 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-06-05 21:28:22,919 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-06-05 21:28:23,367 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-06-05 21:28:24,311 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-06-05 21:28:24,554 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-06-05 21:28:25,289 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-06-05 21:28:26,209 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 21:28:27,131 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 21:28:28,150 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-06-05 21:28:28,811 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-06-05 21:28:29,919 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-06-05 21:28:30,103 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 21:28:30,274 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 21:28:30,489 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-06-05 21:28:30,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:30,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:30,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:28:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:30,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757630531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:30,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:30,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:28:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569557147] [2021-06-05 21:28:30,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:28:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:28:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:30,800 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:31,023 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-06-05 21:28:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:28:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:28:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:31,025 INFO L225 Difference]: With dead ends: 848 [2021-06-05 21:28:31,025 INFO L226 Difference]: Without dead ends: 845 [2021-06-05 21:28:31,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-05 21:28:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-06-05 21:28:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-06-05 21:28:31,033 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-06-05 21:28:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:31,033 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-06-05 21:28:31,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-06-05 21:28:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:28:31,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:31,034 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:31,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 21:28:31,236 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-06-05 21:28:31,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:31,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347267599] [2021-06-05 21:28:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:31,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347267599] [2021-06-05 21:28:31,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347267599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58393683] [2021-06-05 21:28:31,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:31,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:31,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:31,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:28:31,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:31,678 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:28:31,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:28:32,680 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-06-05 21:28:32,906 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-06-05 21:28:33,912 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-06-05 21:28:34,383 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-06-05 21:28:34,939 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 21:28:35,494 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 21:28:36,115 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-06-05 21:28:36,810 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-06-05 21:28:37,283 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-06-05 21:28:37,762 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-06-05 21:28:37,963 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-06-05 21:28:38,901 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-06-05 21:28:39,395 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-06-05 21:28:39,639 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-06-05 21:28:39,930 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-06-05 21:28:40,327 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 21:28:40,726 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 21:28:41,294 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-06-05 21:28:41,811 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-06-05 21:28:42,130 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-06-05 21:28:42,246 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-06-05 21:28:42,746 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-06-05 21:28:43,108 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-06-05 21:28:43,693 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-06-05 21:28:43,883 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-06-05 21:28:44,146 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-06-05 21:28:44,323 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 21:28:44,678 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-06-05 21:28:45,111 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-06-05 21:28:45,655 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-06-05 21:28:46,010 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 21:28:46,370 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 21:28:46,777 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-06-05 21:28:47,118 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-06-05 21:28:47,625 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-06-05 21:28:48,451 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-06-05 21:28:48,659 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 21:28:48,870 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 21:28:49,095 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-06-05 21:28:49,319 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-06-05 21:28:49,762 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-06-05 21:28:50,403 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 21:28:50,551 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 21:28:50,721 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-06-05 21:28:51,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:51,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:51,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:51,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:28:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58393683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:28:51,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020555489] [2021-06-05 21:28:51,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:28:51,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:28:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:51,009 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,280 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-06-05 21:28:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:28:51,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:28:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:51,282 INFO L225 Difference]: With dead ends: 961 [2021-06-05 21:28:51,282 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 21:28:51,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 21:28:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-06-05 21:28:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-06-05 21:28:51,292 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-06-05 21:28:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,292 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-06-05 21:28:51,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-06-05 21:28:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:28:51,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,293 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-06-05 21:28:51,497 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-06-05 21:28:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095167337] [2021-06-05 21:28:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:51,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095167337] [2021-06-05 21:28:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095167337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878300121] [2021-06-05 21:28:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:28:51,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:51,947 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:28:51,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:51,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:28:52,593 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-06-05 21:28:52,726 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-06-05 21:28:52,896 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-06-05 21:28:53,534 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-06-05 21:28:53,666 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-06-05 21:28:53,983 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 21:28:54,306 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 21:28:54,696 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-06-05 21:28:55,214 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-06-05 21:28:55,431 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-06-05 21:28:55,582 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-06-05 21:28:55,687 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 237 [2021-06-05 21:28:56,293 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-06-05 21:28:57,357 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-06-05 21:28:57,614 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-06-05 21:28:57,956 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-06-05 21:28:59,014 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-06-05 21:28:59,545 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-06-05 21:28:59,799 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-06-05 21:29:00,801 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-06-05 21:29:00,996 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-06-05 21:29:01,884 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-06-05 21:29:02,664 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 21:29:03,477 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 21:29:04,563 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-06-05 21:29:05,102 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-06-05 21:29:05,551 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-06-05 21:29:05,708 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-06-05 21:29:05,834 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-06-05 21:29:06,276 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-06-05 21:29:06,481 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-06-05 21:29:07,019 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-06-05 21:29:07,182 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-06-05 21:29:07,345 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-06-05 21:29:08,191 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 21:29:08,430 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 21:29:08,713 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-06-05 21:29:09,036 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-06-05 21:29:09,168 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-06-05 21:29:09,742 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 21:29:09,858 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 21:29:09,995 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-06-05 21:29:10,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:10,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:10,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:10,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:29:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:10,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878300121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:10,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:29:10,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036481943] [2021-06-05 21:29:10,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:29:10,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:10,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:29:10,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:10,561 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:10,822 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-06-05 21:29:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:29:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:10,824 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 21:29:10,824 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 21:29:10,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 21:29:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-06-05 21:29:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-06-05 21:29:10,835 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-06-05 21:29:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:10,835 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-06-05 21:29:10,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-06-05 21:29:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:29:10,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:10,836 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:11,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-06-05 21:29:11,041 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-06-05 21:29:11,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:11,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107678524] [2021-06-05 21:29:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:11,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107678524] [2021-06-05 21:29:11,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107678524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043403953] [2021-06-05 21:29:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:11,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:29:11,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:29:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:11,509 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:29:11,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:11,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:29:12,514 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-06-05 21:29:13,196 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-06-05 21:29:14,023 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-06-05 21:29:14,196 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-06-05 21:29:14,769 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-06-05 21:29:15,453 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-06-05 21:29:16,247 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 21:29:17,037 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 21:29:17,961 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-06-05 21:29:18,660 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-06-05 21:29:19,037 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-06-05 21:29:19,582 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-06-05 21:29:20,705 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-06-05 21:29:20,963 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-06-05 21:29:21,356 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-06-05 21:29:21,859 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 21:29:22,358 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 21:29:23,017 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-06-05 21:29:23,441 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-06-05 21:29:23,725 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-06-05 21:29:24,168 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 311 [2021-06-05 21:29:24,701 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-06-05 21:29:24,867 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-06-05 21:29:25,089 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 21:29:25,303 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 21:29:25,541 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-06-05 21:29:25,715 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-06-05 21:29:26,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:26,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:26,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:26,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:29:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:26,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043403953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:26,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:26,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:29:26,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472490157] [2021-06-05 21:29:26,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:29:26,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:29:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:26,716 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:26,983 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-06-05 21:29:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:29:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:26,986 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 21:29:26,986 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 21:29:26,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 21:29:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-06-05 21:29:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-06-05 21:29:26,999 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-06-05 21:29:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:26,999 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-06-05 21:29:26,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-06-05 21:29:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:29:27,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:27,001 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:27,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-05 21:29:27,217 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-06-05 21:29:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:27,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643126916] [2021-06-05 21:29:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:27,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643126916] [2021-06-05 21:29:27,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643126916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684241689] [2021-06-05 21:29:27,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:27,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:29:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:27,686 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:29:27,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:29:28,659 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-06-05 21:29:28,846 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-06-05 21:29:29,077 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-06-05 21:29:29,364 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-06-05 21:29:29,701 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 21:29:30,037 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 21:29:30,430 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-06-05 21:29:30,859 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-06-05 21:29:31,036 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-06-05 21:29:31,743 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-06-05 21:29:31,908 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-06-05 21:29:32,038 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-06-05 21:29:34,258 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-06-05 21:29:34,499 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-06-05 21:29:34,906 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 21:29:35,305 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 21:29:36,146 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-06-05 21:29:36,394 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-06-05 21:29:36,657 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-06-05 21:29:36,948 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-06-05 21:29:37,364 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-06-05 21:29:37,639 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-06-05 21:29:38,101 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-06-05 21:29:38,573 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 21:29:39,054 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 21:29:39,580 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-06-05 21:29:40,098 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-06-05 21:29:40,573 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-06-05 21:29:41,005 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-06-05 21:29:41,783 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-06-05 21:29:42,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-06-05 21:29:42,518 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-06-05 21:29:42,866 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-06-05 21:29:43,127 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 21:29:43,395 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 21:29:43,689 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-06-05 21:29:43,977 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-06-05 21:29:44,165 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-06-05 21:29:44,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:44,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:44,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:44,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:29:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684241689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:44,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:29:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318041159] [2021-06-05 21:29:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:29:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:29:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:44,488 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:44,771 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-06-05 21:29:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:29:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:44,773 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 21:29:44,773 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 21:29:44,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 21:29:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-06-05 21:29:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-06-05 21:29:44,788 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-06-05 21:29:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:44,788 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-06-05 21:29:44,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-06-05 21:29:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:29:44,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:44,790 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:45,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-06-05 21:29:45,006 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-06-05 21:29:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:45,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657345165] [2021-06-05 21:29:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:29:45,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:45,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657345165] [2021-06-05 21:29:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657345165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:45,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880359877] [2021-06-05 21:29:45,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:45,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:29:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:45,466 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:29:45,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:45,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:29:46,068 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-06-05 21:29:46,214 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-06-05 21:29:46,378 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-06-05 21:29:47,005 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-06-05 21:29:47,144 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-06-05 21:29:47,478 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 21:29:47,804 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 21:29:48,196 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-06-05 21:29:48,866 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-06-05 21:29:49,175 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-06-05 21:29:49,609 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-06-05 21:29:49,844 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-06-05 21:29:50,008 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-06-05 21:29:50,911 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-06-05 21:29:51,032 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-06-05 21:29:51,824 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-06-05 21:29:52,032 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-06-05 21:29:52,414 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-06-05 21:29:52,575 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-06-05 21:29:52,685 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-06-05 21:29:53,325 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-06-05 21:29:53,500 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-06-05 21:29:53,659 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-06-05 21:29:54,406 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-06-05 21:29:54,748 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-06-05 21:29:55,560 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-06-05 21:29:56,481 WARN L205 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-06-05 21:29:56,760 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-06-05 21:29:57,287 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-06-05 21:29:57,627 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-06-05 21:29:57,878 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-06-05 21:29:58,032 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-06-05 21:29:58,816 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-06-05 21:29:58,974 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-06-05 21:29:59,169 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-06-05 21:29:59,405 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-06-05 21:29:59,724 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-06-05 21:29:59,925 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 21:30:00,728 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 259 [2021-06-05 21:30:00,852 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-06-05 21:30:01,009 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-06-05 21:30:01,271 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-06-05 21:30:01,572 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-06-05 21:30:01,918 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-06-05 21:30:02,382 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-06-05 21:30:03,191 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-06-05 21:30:03,443 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-06-05 21:30:03,555 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 263 [2021-06-05 21:30:04,340 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-06-05 21:30:04,488 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 21:30:04,655 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-06-05 21:30:04,887 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-06-05 21:30:05,226 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-06-05 21:30:05,353 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-06-05 21:30:06,158 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 328 [2021-06-05 21:30:06,301 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-06-05 21:30:06,468 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-06-05 21:30:06,722 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-06-05 21:30:07,049 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-06-05 21:30:07,692 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-06-05 21:30:09,178 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-06-05 21:30:10,956 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-06-05 21:30:14,038 WARN L205 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-06-05 21:30:14,184 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-06-05 21:30:14,528 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-06-05 21:30:14,755 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-06-05 21:30:15,006 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-06-05 21:30:15,110 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-06-05 21:30:16,025 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 21:30:16,200 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 21:30:16,386 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-06-05 21:30:16,550 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-06-05 21:30:17,620 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-06-05 21:30:17,833 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 21:30:18,047 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 21:30:18,289 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-06-05 21:30:18,766 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-06-05 21:30:18,917 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-06-05 21:30:19,019 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 247 [2021-06-05 21:30:19,843 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-06-05 21:30:20,033 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 21:30:20,222 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 21:30:20,440 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-06-05 21:30:20,564 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-06-05 21:30:21,404 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 21:30:21,535 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 21:30:21,685 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-06-05 21:30:22,098 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-06-05 21:30:23,074 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-06-05 21:30:24,244 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-06-05 21:30:28,579 WARN L205 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 21:30:32,910 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 21:30:37,849 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-06-05 21:30:38,058 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-06-05 21:30:42,772 WARN L205 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-06-05 21:30:42,918 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-06-05 21:30:43,078 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-06-05 21:30:43,614 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 180 [2021-06-05 21:30:45,245 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-06-05 21:30:47,293 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-06-05 21:30:47,936 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-06-05 21:30:48,293 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-06-05 21:30:48,768 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-06-05 21:30:48,973 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-06-05 21:30:49,515 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-06-05 21:30:50,781 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-06-05 21:30:51,074 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-06-05 21:30:51,514 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 223 [2021-06-05 21:30:52,576 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-06-05 21:30:53,304 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-06-05 21:30:54,668 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-06-05 21:30:57,667 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 21:31:00,692 WARN L205 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 21:31:03,857 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-06-05 21:31:04,546 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 203 [2021-06-05 21:31:04,799 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-06-05 21:31:05,830 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 21:31:06,677 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 21:31:07,594 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-06-05 21:31:08,088 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-06-05 21:31:08,258 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-06-05 21:31:08,998 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 278 [2021-06-05 21:31:09,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:09,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:09,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:09,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:31:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:09,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880359877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:09,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:09,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:31:09,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822821727] [2021-06-05 21:31:09,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:31:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:31:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:31:09,292 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:09,556 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-06-05 21:31:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:31:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:31:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:09,559 INFO L225 Difference]: With dead ends: 1521 [2021-06-05 21:31:09,559 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 21:31:09,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:31:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 21:31:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-06-05 21:31:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-06-05 21:31:09,576 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-06-05 21:31:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:09,576 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-06-05 21:31:09,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-06-05 21:31:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:31:09,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:09,578 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:09,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-06-05 21:31:09,794 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-06-05 21:31:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:09,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348504313] [2021-06-05 21:31:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:09,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348504313] [2021-06-05 21:31:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348504313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392298468] [2021-06-05 21:31:09,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:09,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:31:09,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:31:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:10,253 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:31:10,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:31:10,919 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 248 [2021-06-05 21:31:11,037 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-06-05 21:31:11,181 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-06-05 21:31:11,899 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-06-05 21:31:12,035 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-06-05 21:31:12,204 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-06-05 21:31:12,599 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-06-05 21:31:13,042 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 21:31:13,493 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 21:31:14,020 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-06-05 21:31:15,063 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-06-05 21:31:15,610 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-06-05 21:31:16,154 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-06-05 21:31:16,364 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 21:31:16,605 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 21:31:16,823 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-06-05 21:31:17,749 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-06-05 21:31:17,909 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-06-05 21:31:18,695 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-06-05 21:31:18,974 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-06-05 21:31:19,827 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-06-05 21:31:20,611 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-06-05 21:31:21,237 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-06-05 21:31:22,029 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-06-05 21:31:23,034 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-06-05 21:31:24,048 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-06-05 21:31:24,289 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-06-05 21:31:24,485 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-06-05 21:31:24,657 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-06-05 21:31:26,089 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-06-05 21:31:26,322 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-06-05 21:31:26,653 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-06-05 21:31:26,848 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-06-05 21:31:28,139 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-06-05 21:31:28,395 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-06-05 21:31:29,062 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-06-05 21:31:29,741 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-06-05 21:31:30,593 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-06-05 21:31:31,612 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-06-05 21:31:33,853 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-06-05 21:31:34,335 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-06-05 21:31:34,533 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-06-05 21:31:36,060 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-06-05 21:31:36,308 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-06-05 21:31:36,634 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-06-05 21:31:37,028 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-06-05 21:31:37,508 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-06-05 21:31:38,417 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-06-05 21:31:39,048 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-06-05 21:31:39,361 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-06-05 21:31:39,738 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-06-05 21:31:40,645 WARN L205 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-06-05 21:31:41,607 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-06-05 21:31:41,875 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-06-05 21:31:42,096 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-06-05 21:31:42,255 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-06-05 21:31:42,975 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 230 [2021-06-05 21:31:43,136 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-06-05 21:31:43,305 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-06-05 21:31:44,002 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-06-05 21:31:44,154 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-06-05 21:31:44,508 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-06-05 21:31:44,724 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-06-05 21:31:45,742 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-06-05 21:31:46,413 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-06-05 21:31:47,079 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-06-05 21:31:47,941 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-06-05 21:31:48,814 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-06-05 21:31:49,895 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-06-05 21:31:52,040 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-06-05 21:31:54,670 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-06-05 21:32:00,193 WARN L205 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-06-05 21:32:05,958 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-06-05 21:32:13,214 WARN L205 SmtUtils]: Spent 7.24 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 21:32:20,419 WARN L205 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 21:32:28,434 WARN L205 SmtUtils]: Spent 8.01 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-06-05 21:32:29,189 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-06-05 21:32:41,408 WARN L205 SmtUtils]: Spent 12.21 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-06-05 21:32:44,125 WARN L205 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-06-05 21:32:46,043 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-06-05 21:32:46,336 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-06-05 21:32:46,524 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-06-05 21:32:46,653 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-06-05 21:32:47,151 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-06-05 21:32:47,574 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-06-05 21:32:48,289 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-06-05 21:32:49,823 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-06-05 21:32:50,314 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-06-05 21:32:50,640 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-06-05 21:32:51,267 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-06-05 21:32:51,426 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-06-05 21:32:52,015 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-06-05 21:32:53,090 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-06-05 21:32:55,277 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-06-05 21:32:58,821 WARN L205 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-06-05 21:33:00,173 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-06-05 21:33:01,485 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-06-05 21:33:01,624 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-06-05 21:33:02,014 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-06-05 21:33:02,144 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-06-05 21:33:02,719 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-06-05 21:33:02,900 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-06-05 21:33:03,360 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-06-05 21:33:04,319 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-06-05 21:33:05,236 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-06-05 21:33:05,753 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-06-05 21:33:05,913 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-06-05 21:33:06,216 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-06-05 21:33:06,776 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-06-05 21:33:07,041 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-06-05 21:33:07,401 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-06-05 21:33:08,190 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-06-05 21:33:10,173 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-06-05 21:33:13,163 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-06-05 21:33:16,908 WARN L205 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-06-05 21:33:21,176 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 21:33:25,436 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 21:33:29,949 WARN L205 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-06-05 21:33:32,220 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-06-05 21:33:32,390 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-06-05 21:33:33,646 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-06-05 21:33:33,801 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-06-05 21:33:34,243 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-06-05 21:33:34,805 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-06-05 21:33:35,161 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-06-05 21:33:35,580 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-06-05 21:33:36,004 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-06-05 21:33:36,184 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-06-05 21:33:36,418 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 136 [2021-06-05 21:33:36,596 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-06-05 21:33:37,239 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 21:33:37,873 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 21:33:38,563 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-06-05 21:33:39,153 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 21:33:39,267 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 21:33:39,394 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-06-05 21:33:39,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:39,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:39,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:33:39,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:33:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:39,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392298468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:39,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:39,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:33:39,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840334942] [2021-06-05 21:33:39,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:33:39,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:33:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:39,576 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:39,824 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-06-05 21:33:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:33:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:33:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:39,827 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 21:33:39,827 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 21:33:39,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:33:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 21:33:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-06-05 21:33:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-06-05 21:33:39,847 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-06-05 21:33:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:39,848 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-06-05 21:33:39,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-06-05 21:33:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:33:39,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:39,849 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:40,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:40,065 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-06-05 21:33:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578228513] [2021-06-05 21:33:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:33:40,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:40,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578228513] [2021-06-05 21:33:40,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578228513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:40,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856450530] [2021-06-05 21:33:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:40,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:33:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:33:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:40,514 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:33:40,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:40,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:33:41,250 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-06-05 21:33:41,392 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-06-05 21:33:41,564 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 21:33:41,746 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 21:33:41,954 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-06-05 21:33:42,314 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-06-05 21:33:42,764 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-06-05 21:33:42,958 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-06-05 21:33:43,171 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-06-05 21:33:43,328 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 21:33:43,837 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-06-05 21:33:44,077 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-06-05 21:33:44,736 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-06-05 21:33:45,338 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-06-05 21:33:45,567 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-06-05 21:33:45,902 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-06-05 21:33:46,335 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-06-05 21:33:46,911 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-06-05 21:33:47,375 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-06-05 21:33:48,587 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-06-05 21:33:48,856 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-06-05 21:33:49,188 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-06-05 21:33:50,104 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-06-05 21:33:51,316 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-06-05 21:33:52,813 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-06-05 21:33:53,274 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-06-05 21:33:53,501 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 21:33:53,659 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 253 [2021-06-05 21:33:53,901 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-06-05 21:33:54,815 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-06-05 21:33:55,178 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-06-05 21:33:55,602 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-06-05 21:33:55,876 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-06-05 21:33:56,040 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-06-05 21:33:56,632 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-06-05 21:33:57,292 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 234 [2021-06-05 21:33:57,567 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-06-05 21:33:58,018 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-06-05 21:33:58,591 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-06-05 21:33:59,687 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-06-05 21:34:01,060 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-06-05 21:34:04,152 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 21:34:07,266 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 21:34:10,632 WARN L205 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-06-05 21:34:10,764 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-06-05 21:34:10,952 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-06-05 21:34:12,729 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-06-05 21:34:13,000 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-06-05 21:34:13,618 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 21:34:13,723 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 21:34:14,112 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-06-05 21:34:14,400 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-06-05 21:34:15,499 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-06-05 21:34:16,297 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-06-05 21:34:16,833 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-06-05 21:34:16,999 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-06-05 21:34:17,203 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-06-05 21:34:17,448 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 21:34:17,692 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 21:34:18,027 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-06-05 21:34:18,499 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-06-05 21:34:19,253 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-06-05 21:34:19,383 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-06-05 21:34:20,076 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-06-05 21:34:20,516 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-06-05 21:34:21,659 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-06-05 21:34:21,816 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-06-05 21:34:22,060 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-06-05 21:34:22,244 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-06-05 21:34:22,944 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 21:34:23,632 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 21:34:24,398 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-06-05 21:34:25,140 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-06-05 21:34:25,332 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-06-05 21:34:25,991 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-06-05 21:34:26,747 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-06-05 21:34:26,983 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 21:34:27,223 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 21:34:27,486 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-06-05 21:34:27,795 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-06-05 21:34:28,065 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-06-05 21:34:28,494 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-06-05 21:34:28,787 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 21:34:28,898 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 21:34:29,016 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-06-05 21:34:29,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:29,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:29,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:34:29,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:34:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856450530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:29,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:29,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:34:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671943195] [2021-06-05 21:34:29,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:34:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:34:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:29,293 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:29,527 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-06-05 21:34:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:34:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:34:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:29,530 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 21:34:29,530 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 21:34:29,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 21:34:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-06-05 21:34:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-06-05 21:34:29,552 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-06-05 21:34:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:29,552 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-06-05 21:34:29,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-06-05 21:34:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:34:29,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:29,554 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:29,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-06-05 21:34:29,771 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-06-05 21:34:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:29,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718355472] [2021-06-05 21:34:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:29,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718355472] [2021-06-05 21:34:29,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718355472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921393911] [2021-06-05 21:34:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:29,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:34:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:34:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:30,232 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:34:30,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:30,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:34:30,928 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-06-05 21:34:31,075 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-06-05 21:34:31,255 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 21:34:31,435 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 21:34:31,661 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-06-05 21:34:31,976 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-06-05 21:34:32,542 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-06-05 21:34:32,720 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-06-05 21:34:32,838 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-06-05 21:34:33,013 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-06-05 21:34:33,838 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-06-05 21:34:34,026 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-06-05 21:34:34,913 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-06-05 21:34:35,155 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-06-05 21:34:36,019 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 210 [2021-06-05 21:34:36,172 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-06-05 21:34:36,957 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 190 [2021-06-05 21:34:37,075 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-06-05 21:34:37,231 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-06-05 21:34:37,542 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-06-05 21:34:38,190 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-06-05 21:34:39,088 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-06-05 21:34:40,179 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 21:34:41,277 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 21:34:42,491 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-06-05 21:34:45,267 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-06-05 21:34:46,977 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-06-05 21:34:47,241 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-06-05 21:34:47,360 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-06-05 21:34:49,354 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-06-05 21:34:49,913 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-06-05 21:34:50,303 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-06-05 21:34:51,202 WARN L205 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-06-05 21:34:52,694 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 21:34:53,748 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 21:34:54,881 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-06-05 21:34:55,544 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-06-05 21:34:56,004 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-06-05 21:34:56,370 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-06-05 21:34:56,928 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 21:34:57,074 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 21:34:57,228 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-06-05 21:34:58,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:34:58,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:58,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:34:58,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:34:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:58,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921393911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:58,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:58,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:34:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307857640] [2021-06-05 21:34:58,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:34:58,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:34:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:58,205 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:58,547 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-06-05 21:34:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:34:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:34:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:58,551 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 21:34:58,551 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 21:34:58,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 21:34:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-06-05 21:34:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-06-05 21:34:58,573 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-06-05 21:34:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:58,573 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-06-05 21:34:58,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-06-05 21:34:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:34:58,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:58,575 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:58,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:58,792 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-06-05 21:34:58,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:58,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258593364] [2021-06-05 21:34:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:58,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258593364] [2021-06-05 21:34:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258593364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462018013] [2021-06-05 21:34:58,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:58,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:34:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:34:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:59,290 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:34:59,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:34:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:34:59,821 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-06-05 21:34:59,949 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-06-05 21:35:00,589 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-06-05 21:35:01,358 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-06-05 21:35:01,801 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 21:35:02,228 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 21:35:02,746 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-06-05 21:35:03,313 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-06-05 21:35:03,457 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-06-05 21:35:03,566 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-06-05 21:35:04,546 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-06-05 21:35:06,322 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-06-05 21:35:06,531 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-06-05 21:35:06,813 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-06-05 21:35:07,222 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-06-05 21:35:07,754 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 21:35:08,270 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 21:35:08,997 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-06-05 21:35:09,525 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-06-05 21:35:09,697 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-06-05 21:35:09,812 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-06-05 21:35:10,160 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 285 [2021-06-05 21:35:10,613 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-06-05 21:35:10,976 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-06-05 21:35:11,138 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 21:35:11,282 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 21:35:11,448 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-06-05 21:35:11,596 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-06-05 21:35:11,798 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-06-05 21:35:12,542 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-06-05 21:35:13,523 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 21:35:13,686 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 21:35:13,876 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-06-05 21:35:14,076 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-06-05 21:35:14,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:14,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:14,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:14,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:35:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462018013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:35:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806643286] [2021-06-05 21:35:14,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:14,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:14,728 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:15,037 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-06-05 21:35:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:35:15,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:35:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:15,041 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 21:35:15,041 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 21:35:15,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 21:35:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-06-05 21:35:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-06-05 21:35:15,064 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-06-05 21:35:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:15,065 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-06-05 21:35:15,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-06-05 21:35:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:35:15,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:15,067 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:15,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:15,270 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-06-05 21:35:15,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:15,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562756674] [2021-06-05 21:35:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:15,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:15,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562756674] [2021-06-05 21:35:15,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562756674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:15,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97800051] [2021-06-05 21:35:15,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:35:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:15,793 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:35:15,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:15,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:35:16,723 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 21:35:16,880 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 21:35:17,072 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-06-05 21:35:17,199 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-06-05 21:35:18,176 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-06-05 21:35:18,368 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-06-05 21:35:18,544 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-06-05 21:35:19,700 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-06-05 21:35:19,897 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-06-05 21:35:20,176 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-06-05 21:35:20,533 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-06-05 21:35:20,693 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-06-05 21:35:21,829 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-06-05 21:35:22,029 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-06-05 21:35:22,296 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-06-05 21:35:22,942 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-06-05 21:35:23,751 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-06-05 21:35:24,715 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-06-05 21:35:24,977 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-06-05 21:35:25,081 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-06-05 21:35:26,242 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-06-05 21:35:26,443 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 21:35:26,735 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-06-05 21:35:27,039 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-06-05 21:35:27,432 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-06-05 21:35:27,541 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-06-05 21:35:28,791 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-06-05 21:35:28,944 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-06-05 21:35:29,197 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-06-05 21:35:29,545 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-06-05 21:35:29,946 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-06-05 21:35:30,800 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-06-05 21:35:32,116 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-06-05 21:35:33,174 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-06-05 21:35:35,427 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 21:35:37,733 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 21:35:40,172 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-06-05 21:35:42,861 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-06-05 21:35:43,169 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-06-05 21:35:43,764 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-06-05 21:35:44,013 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-06-05 21:35:44,960 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-06-05 21:35:45,127 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-06-05 21:35:45,382 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 21:35:45,655 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 21:35:45,885 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-06-05 21:35:46,736 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-06-05 21:35:47,536 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 21:35:47,647 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 21:35:47,774 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-06-05 21:35:47,888 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-06-05 21:35:48,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:35:48,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:35:48,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:35:48,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:35:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97800051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:48,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 21:35:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061015338] [2021-06-05 21:35:48,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:35:48,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:35:48,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:48,723 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:49,054 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-06-05 21:35:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:35:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:35:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:49,057 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 21:35:49,057 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 21:35:49,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:35:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 21:35:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-06-05 21:35:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-06-05 21:35:49,082 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-06-05 21:35:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:49,082 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-06-05 21:35:49,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-06-05 21:35:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:49,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:49,084 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:49,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:49,301 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-06-05 21:35:49,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:49,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746479315] [2021-06-05 21:35:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:49,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746479315] [2021-06-05 21:35:49,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746479315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278101009] [2021-06-05 21:35:49,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:49,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:49,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278101009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:49,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:49,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:35:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92514146] [2021-06-05 21:35:49,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:35:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:35:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:35:49,455 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:49,621 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-06-05 21:35:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:35:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:49,623 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 21:35:49,623 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 21:35:49,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:35:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 21:35:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-06-05 21:35:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-06-05 21:35:49,647 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-06-05 21:35:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:49,647 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-06-05 21:35:49,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-06-05 21:35:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:49,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:49,649 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:49,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-06-05 21:35:49,861 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-06-05 21:35:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:49,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377427570] [2021-06-05 21:35:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:49,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377427570] [2021-06-05 21:35:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377427570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:49,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63749275] [2021-06-05 21:35:49,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:49,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:35:49,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:49,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:50,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63749275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:50,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:50,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:35:50,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321981164] [2021-06-05 21:35:50,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:35:50,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:50,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:35:50,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:35:50,013 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:50,351 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-06-05 21:35:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:35:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:50,354 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 21:35:50,354 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 21:35:50,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:35:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 21:35:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-06-05 21:35:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-06-05 21:35:50,401 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-06-05 21:35:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:50,401 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-06-05 21:35:50,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-06-05 21:35:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:50,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:50,404 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-06-05 21:35:50,625 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:50,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-06-05 21:35:50,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:50,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871438210] [2021-06-05 21:35:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:50,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871438210] [2021-06-05 21:35:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871438210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352206265] [2021-06-05 21:35:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:50,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352206265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728168262] [2021-06-05 21:35:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:50,765 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:50,905 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-06-05 21:35:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:50,908 INFO L225 Difference]: With dead ends: 2016 [2021-06-05 21:35:50,908 INFO L226 Difference]: Without dead ends: 2015 [2021-06-05 21:35:50,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-06-05 21:35:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-06-05 21:35:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-06-05 21:35:50,929 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-06-05 21:35:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:50,929 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-06-05 21:35:50,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-06-05 21:35:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:50,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:50,931 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:51,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:51,132 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-06-05 21:35:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:51,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758348771] [2021-06-05 21:35:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:51,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:51,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758348771] [2021-06-05 21:35:51,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758348771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:51,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606981984] [2021-06-05 21:35:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:51,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:35:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:51,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606981984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:51,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:51,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:51,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773298964] [2021-06-05 21:35:51,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:51,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:51,271 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:51,339 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-06-05 21:35:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:35:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:51,344 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 21:35:51,344 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 21:35:51,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 21:35:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-05 21:35:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-06-05 21:35:51,369 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-06-05 21:35:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:51,369 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-06-05 21:35:51,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-06-05 21:35:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:51,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:51,372 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:51,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-06-05 21:35:51,584 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:51,584 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-06-05 21:35:51,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:51,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945748462] [2021-06-05 21:35:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:51,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945748462] [2021-06-05 21:35:51,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945748462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559803243] [2021-06-05 21:35:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:51,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:35:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:51,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559803243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:51,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:51,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:51,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896931331] [2021-06-05 21:35:51,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:51,718 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:51,843 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-06-05 21:35:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:35:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:51,846 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 21:35:51,846 INFO L226 Difference]: Without dead ends: 2210 [2021-06-05 21:35:51,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:35:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-05 21:35:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-06-05 21:35:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-06-05 21:35:51,868 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-06-05 21:35:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:51,868 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-06-05 21:35:51,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-06-05 21:35:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:51,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:51,870 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:52,071 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-06-05 21:35:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:52,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914989669] [2021-06-05 21:35:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:52,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914989669] [2021-06-05 21:35:52,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914989669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952527768] [2021-06-05 21:35:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:52,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952527768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:52,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:52,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:52,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799385331] [2021-06-05 21:35:52,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:52,197 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:52,356 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-06-05 21:35:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:52,358 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 21:35:52,358 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 21:35:52,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 21:35:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-06-05 21:35:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-06-05 21:35:52,380 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-06-05 21:35:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:52,380 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-06-05 21:35:52,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-06-05 21:35:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:52,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:52,383 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:52,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-06-05 21:35:52,597 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-06-05 21:35:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:52,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705444733] [2021-06-05 21:35:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:52,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:52,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705444733] [2021-06-05 21:35:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705444733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:52,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402900601] [2021-06-05 21:35:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:52,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:52,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402900601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:52,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:52,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:52,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148916188] [2021-06-05 21:35:52,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:52,727 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:52,898 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-06-05 21:35:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:52,901 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 21:35:52,901 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 21:35:52,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 21:35:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-06-05 21:35:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-06-05 21:35:52,921 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-06-05 21:35:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:52,921 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-06-05 21:35:52,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-06-05 21:35:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:52,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:52,923 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:53,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-06-05 21:35:53,124 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-06-05 21:35:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:53,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504383796] [2021-06-05 21:35:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:53,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:53,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504383796] [2021-06-05 21:35:53,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504383796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190126303] [2021-06-05 21:35:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:53,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:35:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:53,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190126303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:53,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558766142] [2021-06-05 21:35:53,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:53,256 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:53,320 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-06-05 21:35:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:35:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:53,324 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 21:35:53,324 INFO L226 Difference]: Without dead ends: 2273 [2021-06-05 21:35:53,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-05 21:35:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-06-05 21:35:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-06-05 21:35:53,347 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-06-05 21:35:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:53,347 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-06-05 21:35:53,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-06-05 21:35:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:53,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:53,349 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:53,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:53,550 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-06-05 21:35:53,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:53,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428515464] [2021-06-05 21:35:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:53,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428515464] [2021-06-05 21:35:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428515464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138774427] [2021-06-05 21:35:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:53,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:53,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138774427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:53,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979113186] [2021-06-05 21:35:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:53,681 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:53,864 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-06-05 21:35:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:35:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:53,866 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 21:35:53,866 INFO L226 Difference]: Without dead ends: 2017 [2021-06-05 21:35:53,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-06-05 21:35:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-06-05 21:35:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-06-05 21:35:53,886 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-06-05 21:35:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:53,886 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-06-05 21:35:53,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-06-05 21:35:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:53,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:53,889 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:54,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:54,089 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-06-05 21:35:54,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:54,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269727538] [2021-06-05 21:35:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:54,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269727538] [2021-06-05 21:35:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269727538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57993387] [2021-06-05 21:35:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:54,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:35:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57993387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:54,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:54,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143339113] [2021-06-05 21:35:54,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:54,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:54,223 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:54,296 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-06-05 21:35:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:35:54,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:54,299 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 21:35:54,299 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 21:35:54,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:35:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 21:35:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-06-05 21:35:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-06-05 21:35:54,325 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-06-05 21:35:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:54,325 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-06-05 21:35:54,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-06-05 21:35:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:54,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:54,327 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:54,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-06-05 21:35:54,544 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-06-05 21:35:54,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:54,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044481198] [2021-06-05 21:35:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:54,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:54,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044481198] [2021-06-05 21:35:54,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044481198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:54,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990677320] [2021-06-05 21:35:54,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:54,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:35:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990677320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:54,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938134265] [2021-06-05 21:35:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:54,673 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:54,785 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-06-05 21:35:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:35:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:54,788 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 21:35:54,788 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 21:35:54,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:35:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 21:35:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-06-05 21:35:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-06-05 21:35:54,808 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-06-05 21:35:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:54,808 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-06-05 21:35:54,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-06-05 21:35:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:54,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:54,810 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:55,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-06-05 21:35:55,011 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-06-05 21:35:55,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:55,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743210998] [2021-06-05 21:35:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:55,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743210998] [2021-06-05 21:35:55,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743210998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:55,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093009163] [2021-06-05 21:35:55,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:55,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093009163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:55,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:55,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:55,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188259704] [2021-06-05 21:35:55,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:55,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:55,132 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:55,290 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-06-05 21:35:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:55,293 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 21:35:55,293 INFO L226 Difference]: Without dead ends: 2093 [2021-06-05 21:35:55,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-06-05 21:35:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-06-05 21:35:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-06-05 21:35:55,314 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-06-05 21:35:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:55,314 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-06-05 21:35:55,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-06-05 21:35:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:55,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:55,316 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:55,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-06-05 21:35:55,517 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-06-05 21:35:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451118867] [2021-06-05 21:35:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:55,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:55,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451118867] [2021-06-05 21:35:55,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451118867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:55,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2273029] [2021-06-05 21:35:55,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:55,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:55,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2273029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:55,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:55,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315229130] [2021-06-05 21:35:55,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:55,652 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:55,819 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-06-05 21:35:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:55,821 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 21:35:55,822 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 21:35:55,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 21:35:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-06-05 21:35:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-06-05 21:35:55,842 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-06-05 21:35:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:55,842 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-06-05 21:35:55,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-06-05 21:35:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:55,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:55,844 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:56,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-05 21:35:56,045 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-06-05 21:35:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:56,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366737131] [2021-06-05 21:35:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:56,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366737131] [2021-06-05 21:35:56,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366737131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317191912] [2021-06-05 21:35:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:56,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:35:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:56,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:56,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317191912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:56,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:56,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893661863] [2021-06-05 21:35:56,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:56,178 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:56,241 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-06-05 21:35:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:35:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:56,244 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 21:35:56,244 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 21:35:56,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 21:35:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-06-05 21:35:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-06-05 21:35:56,265 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-06-05 21:35:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-06-05 21:35:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-06-05 21:35:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:56,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:56,268 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:56,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:56,477 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-06-05 21:35:56,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:56,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96291903] [2021-06-05 21:35:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:56,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:56,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96291903] [2021-06-05 21:35:56,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96291903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:56,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049834331] [2021-06-05 21:35:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:56,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:56,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:56,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049834331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:56,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:56,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518355661] [2021-06-05 21:35:56,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:56,613 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:56,779 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-06-05 21:35:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:35:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:56,782 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 21:35:56,782 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 21:35:56,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 21:35:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-06-05 21:35:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-06-05 21:35:56,802 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-06-05 21:35:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:56,802 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-06-05 21:35:56,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-06-05 21:35:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:56,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:56,804 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:57,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:57,005 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-06-05 21:35:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:57,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095921750] [2021-06-05 21:35:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:57,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095921750] [2021-06-05 21:35:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095921750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077120245] [2021-06-05 21:35:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:57,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:35:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077120245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:57,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:57,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057501240] [2021-06-05 21:35:57,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:57,143 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:57,221 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-06-05 21:35:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:35:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:57,225 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 21:35:57,225 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 21:35:57,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:35:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 21:35:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-06-05 21:35:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-06-05 21:35:57,270 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-06-05 21:35:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:57,270 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-06-05 21:35:57,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-06-05 21:35:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:57,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:57,273 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-06-05 21:35:57,489 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-06-05 21:35:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518284624] [2021-06-05 21:35:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:57,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:57,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518284624] [2021-06-05 21:35:57,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518284624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:57,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133874110] [2021-06-05 21:35:57,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:57,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:35:57,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:57,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133874110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:57,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:57,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:57,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347605705] [2021-06-05 21:35:57,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:57,632 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:57,786 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-06-05 21:35:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:57,788 INFO L225 Difference]: With dead ends: 1995 [2021-06-05 21:35:57,788 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 21:35:57,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:35:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 21:35:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-06-05 21:35:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-06-05 21:35:57,810 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-06-05 21:35:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:57,811 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-06-05 21:35:57,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-06-05 21:35:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:57,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:57,814 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:58,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-06-05 21:35:58,031 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-06-05 21:35:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:58,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999056456] [2021-06-05 21:35:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:58,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:58,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999056456] [2021-06-05 21:35:58,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999056456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726405391] [2021-06-05 21:35:58,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726405391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:58,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:58,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:35:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459579422] [2021-06-05 21:35:58,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:35:58,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:35:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:35:58,166 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:58,288 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-06-05 21:35:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:35:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:58,292 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 21:35:58,292 INFO L226 Difference]: Without dead ends: 3202 [2021-06-05 21:35:58,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:35:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-06-05 21:35:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-06-05 21:35:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-06-05 21:35:58,324 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-06-05 21:35:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:58,324 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-06-05 21:35:58,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-06-05 21:35:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:58,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:58,326 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:58,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:58,527 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-06-05 21:35:58,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:58,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994942011] [2021-06-05 21:35:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:58,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:58,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994942011] [2021-06-05 21:35:58,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994942011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:58,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435728584] [2021-06-05 21:35:58,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:58,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:35:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:58,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435728584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:58,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:58,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:58,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038613640] [2021-06-05 21:35:58,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:58,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:58,651 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:58,766 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-06-05 21:35:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:35:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:58,770 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 21:35:58,771 INFO L226 Difference]: Without dead ends: 2785 [2021-06-05 21:35:58,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:35:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-06-05 21:35:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-06-05 21:35:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-06-05 21:35:58,805 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-06-05 21:35:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:58,805 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-06-05 21:35:58,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-06-05 21:35:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:58,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:58,807 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:59,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-06-05 21:35:59,024 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:59,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-06-05 21:35:59,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:59,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378729626] [2021-06-05 21:35:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:59,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378729626] [2021-06-05 21:35:59,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378729626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296484388] [2021-06-05 21:35:59,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:35:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:35:59,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296484388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:59,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:59,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:59,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994325782] [2021-06-05 21:35:59,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:59,137 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:59,295 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-06-05 21:35:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:59,298 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 21:35:59,298 INFO L226 Difference]: Without dead ends: 2745 [2021-06-05 21:35:59,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-05 21:35:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-06-05 21:35:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-06-05 21:35:59,327 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-06-05 21:35:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:59,327 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-06-05 21:35:59,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-06-05 21:35:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:59,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:59,330 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:35:59,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:59,530 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:35:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:35:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-06-05 21:35:59,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:35:59,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225803720] [2021-06-05 21:35:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:35:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:35:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:59,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:35:59,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225803720] [2021-06-05 21:35:59,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225803720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:59,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116958691] [2021-06-05 21:35:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:35:59,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:35:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:35:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:35:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:35:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:35:59,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116958691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:35:59,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:35:59,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:35:59,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880603366] [2021-06-05 21:35:59,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:35:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:35:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:35:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:35:59,656 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:35:59,816 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-06-05 21:35:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:35:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:35:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:35:59,819 INFO L225 Difference]: With dead ends: 2659 [2021-06-05 21:35:59,819 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 21:35:59,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:35:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 21:35:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-06-05 21:35:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-06-05 21:35:59,846 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-06-05 21:35:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:35:59,847 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-06-05 21:35:59,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:35:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-06-05 21:35:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:35:59,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:35:59,849 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-06-05 21:36:00,053 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-06-05 21:36:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238228197] [2021-06-05 21:36:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238228197] [2021-06-05 21:36:00,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238228197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385641484] [2021-06-05 21:36:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:00,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:36:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385641484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295082538] [2021-06-05 21:36:00,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:00,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:00,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:00,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:00,179 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:00,248 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-06-05 21:36:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:36:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:00,251 INFO L225 Difference]: With dead ends: 2808 [2021-06-05 21:36:00,251 INFO L226 Difference]: Without dead ends: 2808 [2021-06-05 21:36:00,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-06-05 21:36:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-06-05 21:36:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-06-05 21:36:00,280 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-06-05 21:36:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:00,280 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-06-05 21:36:00,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-06-05 21:36:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:00,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:00,283 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:00,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-06-05 21:36:00,483 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-06-05 21:36:00,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:00,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739381348] [2021-06-05 21:36:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:00,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:00,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739381348] [2021-06-05 21:36:00,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739381348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:00,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862942345] [2021-06-05 21:36:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:00,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:00,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:00,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862942345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:00,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:00,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980305230] [2021-06-05 21:36:00,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:00,610 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:00,780 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-06-05 21:36:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:00,784 INFO L225 Difference]: With dead ends: 2648 [2021-06-05 21:36:00,784 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 21:36:00,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:00,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 21:36:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-06-05 21:36:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-06-05 21:36:00,812 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-06-05 21:36:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:00,812 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-06-05 21:36:00,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-06-05 21:36:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:00,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:00,814 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:01,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-06-05 21:36:01,015 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-06-05 21:36:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552576963] [2021-06-05 21:36:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:01,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:01,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552576963] [2021-06-05 21:36:01,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552576963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:01,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574542046] [2021-06-05 21:36:01,075 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:01,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574542046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:01,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:01,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:01,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630055467] [2021-06-05 21:36:01,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:01,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:01,142 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:01,223 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-06-05 21:36:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:36:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:01,226 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 21:36:01,226 INFO L226 Difference]: Without dead ends: 2940 [2021-06-05 21:36:01,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-05 21:36:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-06-05 21:36:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-06-05 21:36:01,254 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-06-05 21:36:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:01,254 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-06-05 21:36:01,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-06-05 21:36:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:01,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:01,257 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:01,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-06-05 21:36:01,467 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-06-05 21:36:01,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:01,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815836054] [2021-06-05 21:36:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:01,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815836054] [2021-06-05 21:36:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815836054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548155123] [2021-06-05 21:36:01,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:01,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:01,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548155123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:01,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:01,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233848193] [2021-06-05 21:36:01,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:01,593 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:01,756 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-06-05 21:36:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:01,759 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 21:36:01,759 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 21:36:01,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 21:36:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-06-05 21:36:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-06-05 21:36:01,785 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-06-05 21:36:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:01,785 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-06-05 21:36:01,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-06-05 21:36:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:01,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:01,788 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:01,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:01,988 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:01,988 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-06-05 21:36:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:01,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753961294] [2021-06-05 21:36:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:02,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:02,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753961294] [2021-06-05 21:36:02,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753961294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:02,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294183019] [2021-06-05 21:36:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:02,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:36:02,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:02,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:02,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294183019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:02,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:02,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422020835] [2021-06-05 21:36:02,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:02,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:02,120 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:02,217 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-06-05 21:36:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:36:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:02,222 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 21:36:02,222 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 21:36:02,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:36:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 21:36:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-06-05 21:36:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-06-05 21:36:02,271 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-06-05 21:36:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:02,271 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-06-05 21:36:02,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-06-05 21:36:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:02,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:02,274 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:02,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:02,481 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-06-05 21:36:02,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:02,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706567566] [2021-06-05 21:36:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:02,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706567566] [2021-06-05 21:36:02,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706567566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059036779] [2021-06-05 21:36:02,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:02,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:02,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059036779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:02,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:02,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:02,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438071156] [2021-06-05 21:36:02,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:02,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:02,613 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:02,787 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-06-05 21:36:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:02,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:02,791 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 21:36:02,792 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 21:36:02,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 21:36:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-06-05 21:36:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-06-05 21:36:02,836 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-06-05 21:36:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:02,837 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-06-05 21:36:02,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-06-05 21:36:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:02,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:02,839 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:03,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:03,040 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-06-05 21:36:03,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:03,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144141271] [2021-06-05 21:36:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144141271] [2021-06-05 21:36:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144141271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293121057] [2021-06-05 21:36:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:03,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:36:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:03,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293121057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:03,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:03,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496383764] [2021-06-05 21:36:03,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:03,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:03,197 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:03,339 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-06-05 21:36:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:36:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:03,346 INFO L225 Difference]: With dead ends: 5567 [2021-06-05 21:36:03,347 INFO L226 Difference]: Without dead ends: 5567 [2021-06-05 21:36:03,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-06-05 21:36:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-06-05 21:36:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-06-05 21:36:03,446 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-06-05 21:36:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:03,446 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-06-05 21:36:03,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-06-05 21:36:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:03,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:03,450 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:03,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:03,650 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:03,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:03,651 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-06-05 21:36:03,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:03,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406352324] [2021-06-05 21:36:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:03,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:03,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406352324] [2021-06-05 21:36:03,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406352324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:03,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598150587] [2021-06-05 21:36:03,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:03,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:36:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:03,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598150587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:03,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:03,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:03,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110859119] [2021-06-05 21:36:03,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:03,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:03,782 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:03,881 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-06-05 21:36:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:36:03,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:03,888 INFO L225 Difference]: With dead ends: 5072 [2021-06-05 21:36:03,888 INFO L226 Difference]: Without dead ends: 5072 [2021-06-05 21:36:03,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:36:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-06-05 21:36:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-06-05 21:36:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-06-05 21:36:03,946 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-06-05 21:36:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:03,946 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-06-05 21:36:03,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-06-05 21:36:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:03,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:03,950 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:04,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-06-05 21:36:04,150 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-06-05 21:36:04,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:04,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029143494] [2021-06-05 21:36:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:04,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029143494] [2021-06-05 21:36:04,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029143494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:04,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407436888] [2021-06-05 21:36:04,209 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:04,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407436888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:04,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:04,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377120121] [2021-06-05 21:36:04,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:04,267 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:04,439 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-06-05 21:36:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:04,445 INFO L225 Difference]: With dead ends: 5066 [2021-06-05 21:36:04,445 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 21:36:04,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 21:36:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-06-05 21:36:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-06-05 21:36:04,511 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-06-05 21:36:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:04,511 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-06-05 21:36:04,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-06-05 21:36:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:04,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:04,515 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:04,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:04,716 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-06-05 21:36:04,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:04,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753987021] [2021-06-05 21:36:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:04,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:04,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753987021] [2021-06-05 21:36:04,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753987021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:04,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012236278] [2021-06-05 21:36:04,779 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:04,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012236278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:04,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:04,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767876251] [2021-06-05 21:36:04,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:04,835 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:05,006 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-06-05 21:36:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:05,013 INFO L225 Difference]: With dead ends: 5001 [2021-06-05 21:36:05,013 INFO L226 Difference]: Without dead ends: 4999 [2021-06-05 21:36:05,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-06-05 21:36:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-06-05 21:36:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-06-05 21:36:05,074 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-06-05 21:36:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-06-05 21:36:05,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-06-05 21:36:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:05,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:05,078 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-06-05 21:36:05,278 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-06-05 21:36:05,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:05,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059145475] [2021-06-05 21:36:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:05,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:05,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059145475] [2021-06-05 21:36:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059145475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:05,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969942324] [2021-06-05 21:36:05,338 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:05,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:05,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969942324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:05,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:05,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:05,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633689803] [2021-06-05 21:36:05,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:05,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:05,413 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:05,485 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-06-05 21:36:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:36:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:05,492 INFO L225 Difference]: With dead ends: 5161 [2021-06-05 21:36:05,492 INFO L226 Difference]: Without dead ends: 5161 [2021-06-05 21:36:05,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-05 21:36:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-06-05 21:36:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-06-05 21:36:05,567 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-06-05 21:36:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:05,567 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-06-05 21:36:05,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-06-05 21:36:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:05,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:05,571 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:05,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-05 21:36:05,771 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-06-05 21:36:05,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:05,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937515092] [2021-06-05 21:36:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:05,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:05,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937515092] [2021-06-05 21:36:05,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937515092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:05,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371166162] [2021-06-05 21:36:05,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:05,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:05,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:05,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371166162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:05,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:05,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:05,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706458221] [2021-06-05 21:36:05,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:05,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:05,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:05,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:05,903 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:06,075 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-06-05 21:36:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:06,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:06,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:06,082 INFO L225 Difference]: With dead ends: 5011 [2021-06-05 21:36:06,082 INFO L226 Difference]: Without dead ends: 5009 [2021-06-05 21:36:06,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-06-05 21:36:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-06-05 21:36:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-06-05 21:36:06,147 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-06-05 21:36:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-06-05 21:36:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-06-05 21:36:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:06,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:06,150 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-06-05 21:36:06,351 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-06-05 21:36:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:06,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170410614] [2021-06-05 21:36:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:06,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:06,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170410614] [2021-06-05 21:36:06,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170410614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:06,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051617475] [2021-06-05 21:36:06,406 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:06,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:36:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:06,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051617475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:06,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:06,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:06,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141015309] [2021-06-05 21:36:06,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:06,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:06,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:06,488 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:06,578 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-06-05 21:36:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:36:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:06,585 INFO L225 Difference]: With dead ends: 5260 [2021-06-05 21:36:06,586 INFO L226 Difference]: Without dead ends: 5260 [2021-06-05 21:36:06,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-06-05 21:36:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-06-05 21:36:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-06-05 21:36:06,655 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-06-05 21:36:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:06,655 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-06-05 21:36:06,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-06-05 21:36:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:06,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:06,659 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:06,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:06,873 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-06-05 21:36:06,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:06,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042084364] [2021-06-05 21:36:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:06,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:06,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042084364] [2021-06-05 21:36:06,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042084364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:06,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331494713] [2021-06-05 21:36:06,949 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:06,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:36:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:07,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331494713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:07,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:07,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:07,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198685470] [2021-06-05 21:36:07,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:07,020 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:07,181 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-06-05 21:36:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:07,187 INFO L225 Difference]: With dead ends: 4999 [2021-06-05 21:36:07,187 INFO L226 Difference]: Without dead ends: 4996 [2021-06-05 21:36:07,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-06-05 21:36:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-06-05 21:36:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-06-05 21:36:07,248 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-06-05 21:36:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:07,248 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-06-05 21:36:07,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-06-05 21:36:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:07,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:07,251 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:07,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-06-05 21:36:07,452 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-06-05 21:36:07,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:07,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107946705] [2021-06-05 21:36:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:07,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:07,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107946705] [2021-06-05 21:36:07,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107946705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:07,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767377004] [2021-06-05 21:36:07,511 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767377004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:07,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:07,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:07,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087265676] [2021-06-05 21:36:07,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:07,582 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:07,695 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-06-05 21:36:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:36:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:07,708 INFO L225 Difference]: With dead ends: 8484 [2021-06-05 21:36:07,708 INFO L226 Difference]: Without dead ends: 8484 [2021-06-05 21:36:07,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:36:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-05 21:36:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-06-05 21:36:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-06-05 21:36:07,834 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-06-05 21:36:07,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:07,834 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-06-05 21:36:07,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-06-05 21:36:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:07,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:07,839 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:08,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:08,053 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-06-05 21:36:08,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:08,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055932329] [2021-06-05 21:36:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:08,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055932329] [2021-06-05 21:36:08,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055932329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:08,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240180392] [2021-06-05 21:36:08,119 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:08,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:08,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:08,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:08,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240180392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:08,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:08,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840447094] [2021-06-05 21:36:08,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:08,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:08,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:08,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:08,182 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:08,401 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-06-05 21:36:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:08,413 INFO L225 Difference]: With dead ends: 8250 [2021-06-05 21:36:08,413 INFO L226 Difference]: Without dead ends: 8246 [2021-06-05 21:36:08,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-06-05 21:36:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-06-05 21:36:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-06-05 21:36:08,535 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-06-05 21:36:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:08,535 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-06-05 21:36:08,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-06-05 21:36:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:08,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:08,541 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:08,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:08,752 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-06-05 21:36:08,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:08,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515415875] [2021-06-05 21:36:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:08,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515415875] [2021-06-05 21:36:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515415875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514459771] [2021-06-05 21:36:08,818 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:08,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:08,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514459771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:08,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:08,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:08,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042935194] [2021-06-05 21:36:08,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:08,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:08,891 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:09,050 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-06-05 21:36:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:36:09,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:09,068 INFO L225 Difference]: With dead ends: 11106 [2021-06-05 21:36:09,069 INFO L226 Difference]: Without dead ends: 11106 [2021-06-05 21:36:09,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-05 21:36:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-06-05 21:36:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-06-05 21:36:09,252 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-06-05 21:36:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:09,252 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-06-05 21:36:09,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-06-05 21:36:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:09,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:09,258 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:09,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-06-05 21:36:09,461 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-06-05 21:36:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269965292] [2021-06-05 21:36:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:09,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269965292] [2021-06-05 21:36:09,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269965292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942249957] [2021-06-05 21:36:09,536 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:09,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942249957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:09,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:09,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:09,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370614788] [2021-06-05 21:36:09,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:09,599 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:09,804 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-06-05 21:36:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:36:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:09,822 INFO L225 Difference]: With dead ends: 10860 [2021-06-05 21:36:09,822 INFO L226 Difference]: Without dead ends: 10855 [2021-06-05 21:36:09,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-06-05 21:36:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-06-05 21:36:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-06-05 21:36:09,981 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-06-05 21:36:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:09,981 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-06-05 21:36:09,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-06-05 21:36:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:09,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:09,986 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:10,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-06-05 21:36:10,187 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-06-05 21:36:10,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:10,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301384573] [2021-06-05 21:36:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:10,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301384573] [2021-06-05 21:36:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301384573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084400702] [2021-06-05 21:36:10,260 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:10,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:36:10,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:10,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:10,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:10,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084400702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:10,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:10,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:36:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722287811] [2021-06-05 21:36:10,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:10,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:10,329 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:10,547 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-06-05 21:36:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:10,572 INFO L225 Difference]: With dead ends: 13741 [2021-06-05 21:36:10,572 INFO L226 Difference]: Without dead ends: 13741 [2021-06-05 21:36:10,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:36:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-06-05 21:36:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-06-05 21:36:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-06-05 21:36:10,799 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-06-05 21:36:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:10,799 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-06-05 21:36:10,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-06-05 21:36:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:10,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:10,810 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:11,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:11,025 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-06-05 21:36:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:11,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090275354] [2021-06-05 21:36:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:11,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:11,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090275354] [2021-06-05 21:36:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090275354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:11,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554480083] [2021-06-05 21:36:11,084 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:11,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:11,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:11,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554480083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:11,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:11,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:11,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890780326] [2021-06-05 21:36:11,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:11,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:11,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:11,150 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:11,272 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-06-05 21:36:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:36:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:11,294 INFO L225 Difference]: With dead ends: 13222 [2021-06-05 21:36:11,294 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 21:36:11,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:36:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 21:36:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-06-05 21:36:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-06-05 21:36:11,485 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-06-05 21:36:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:11,485 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-06-05 21:36:11,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-06-05 21:36:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:11,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:11,490 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:11,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-06-05 21:36:11,691 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-06-05 21:36:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:11,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025316406] [2021-06-05 21:36:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:11,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025316406] [2021-06-05 21:36:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025316406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295340220] [2021-06-05 21:36:11,747 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:11,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295340220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:11,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:11,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:11,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295360026] [2021-06-05 21:36:11,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:11,803 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:11,993 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-06-05 21:36:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:12,016 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 21:36:12,016 INFO L226 Difference]: Without dead ends: 13711 [2021-06-05 21:36:12,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-06-05 21:36:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-06-05 21:36:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-06-05 21:36:12,269 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-06-05 21:36:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:12,269 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-06-05 21:36:12,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-06-05 21:36:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:12,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:12,274 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:12,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:12,475 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-06-05 21:36:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:12,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110852781] [2021-06-05 21:36:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:12,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:12,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110852781] [2021-06-05 21:36:12,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110852781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:12,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083044691] [2021-06-05 21:36:12,535 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:12,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:12,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:12,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083044691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:12,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:12,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:12,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985662732] [2021-06-05 21:36:12,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:12,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:12,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:12,594 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:12,772 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-06-05 21:36:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:12,797 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 21:36:12,797 INFO L226 Difference]: Without dead ends: 13653 [2021-06-05 21:36:12,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-06-05 21:36:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-06-05 21:36:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-06-05 21:36:13,016 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-06-05 21:36:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:13,016 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-06-05 21:36:13,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-06-05 21:36:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:13,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:13,021 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-06-05 21:36:13,222 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-06-05 21:36:13,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:13,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192206617] [2021-06-05 21:36:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:13,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192206617] [2021-06-05 21:36:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192206617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569769479] [2021-06-05 21:36:13,283 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:13,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:13,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:13,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569769479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:13,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:13,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059312369] [2021-06-05 21:36:13,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:13,346 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:13,443 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-06-05 21:36:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:36:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:13,465 INFO L225 Difference]: With dead ends: 13677 [2021-06-05 21:36:13,466 INFO L226 Difference]: Without dead ends: 13677 [2021-06-05 21:36:13,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-06-05 21:36:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-06-05 21:36:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-06-05 21:36:13,666 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-06-05 21:36:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:13,667 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-06-05 21:36:13,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-06-05 21:36:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:13,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:13,672 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:13,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-06-05 21:36:13,874 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-06-05 21:36:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:13,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890185204] [2021-06-05 21:36:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:13,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890185204] [2021-06-05 21:36:13,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890185204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:13,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271074568] [2021-06-05 21:36:13,939 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:13,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:13,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271074568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:13,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:13,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:13,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964044529] [2021-06-05 21:36:13,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:13,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:13,996 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:14,206 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-06-05 21:36:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:36:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:14,228 INFO L225 Difference]: With dead ends: 13337 [2021-06-05 21:36:14,228 INFO L226 Difference]: Without dead ends: 13335 [2021-06-05 21:36:14,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-06-05 21:36:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-06-05 21:36:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-06-05 21:36:14,426 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-06-05 21:36:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:14,426 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-06-05 21:36:14,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-06-05 21:36:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:14,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:14,432 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:14,634 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-06-05 21:36:14,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:14,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507751239] [2021-06-05 21:36:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:14,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507751239] [2021-06-05 21:36:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507751239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566401676] [2021-06-05 21:36:14,695 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:14,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:36:14,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:14,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566401676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:14,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:14,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:14,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640148471] [2021-06-05 21:36:14,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:14,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:14,761 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:14,879 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-06-05 21:36:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:14,902 INFO L225 Difference]: With dead ends: 14025 [2021-06-05 21:36:14,902 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 21:36:14,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 21:36:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-06-05 21:36:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-06-05 21:36:15,107 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-06-05 21:36:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:15,107 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-06-05 21:36:15,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-06-05 21:36:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:15,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:15,113 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:15,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:15,313 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-06-05 21:36:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:15,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969916472] [2021-06-05 21:36:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:15,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:15,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969916472] [2021-06-05 21:36:15,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969916472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:15,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2458669] [2021-06-05 21:36:15,386 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:15,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:15,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:15,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2458669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:15,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:15,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:15,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960971076] [2021-06-05 21:36:15,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:15,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:15,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:15,454 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:15,679 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-06-05 21:36:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:15,699 INFO L225 Difference]: With dead ends: 13344 [2021-06-05 21:36:15,699 INFO L226 Difference]: Without dead ends: 13341 [2021-06-05 21:36:15,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-05 21:36:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-06-05 21:36:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-06-05 21:36:15,902 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-06-05 21:36:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:15,903 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-06-05 21:36:15,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-06-05 21:36:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:15,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:15,908 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-06-05 21:36:16,108 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-06-05 21:36:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:16,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701091098] [2021-06-05 21:36:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:16,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:16,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701091098] [2021-06-05 21:36:16,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701091098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:16,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152057410] [2021-06-05 21:36:16,173 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:16,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152057410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:16,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:16,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268442119] [2021-06-05 21:36:16,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:16,241 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:16,404 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-06-05 21:36:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:16,447 INFO L225 Difference]: With dead ends: 23387 [2021-06-05 21:36:16,447 INFO L226 Difference]: Without dead ends: 23387 [2021-06-05 21:36:16,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:36:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-06-05 21:36:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-06-05 21:36:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-06-05 21:36:16,863 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-06-05 21:36:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:16,863 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-06-05 21:36:16,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-06-05 21:36:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:16,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:16,869 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:17,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-06-05 21:36:17,069 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-06-05 21:36:17,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:17,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440659433] [2021-06-05 21:36:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:17,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:17,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440659433] [2021-06-05 21:36:17,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440659433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:17,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112777867] [2021-06-05 21:36:17,143 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112777867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:17,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:17,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033531816] [2021-06-05 21:36:17,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:17,202 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:17,441 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-06-05 21:36:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:17,484 INFO L225 Difference]: With dead ends: 23234 [2021-06-05 21:36:17,484 INFO L226 Difference]: Without dead ends: 23230 [2021-06-05 21:36:17,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-06-05 21:36:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-06-05 21:36:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-06-05 21:36:17,878 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-06-05 21:36:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-06-05 21:36:17,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-06-05 21:36:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:17,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:17,884 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:18,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:18,084 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:18,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-06-05 21:36:18,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:18,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847388932] [2021-06-05 21:36:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:18,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847388932] [2021-06-05 21:36:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847388932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297249142] [2021-06-05 21:36:18,166 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:18,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:18,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297249142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864936501] [2021-06-05 21:36:18,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:18,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:18,230 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:18,418 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-06-05 21:36:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:18,480 INFO L225 Difference]: With dead ends: 28918 [2021-06-05 21:36:18,480 INFO L226 Difference]: Without dead ends: 28918 [2021-06-05 21:36:18,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:36:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-06-05 21:36:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-06-05 21:36:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-06-05 21:36:19,088 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-06-05 21:36:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:19,088 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-06-05 21:36:19,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-06-05 21:36:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:19,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:19,094 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:19,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:19,294 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-06-05 21:36:19,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:19,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041105666] [2021-06-05 21:36:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:19,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:19,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041105666] [2021-06-05 21:36:19,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041105666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171842144] [2021-06-05 21:36:19,366 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:19,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:19,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:19,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171842144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:19,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:19,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:19,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282854413] [2021-06-05 21:36:19,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:19,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:19,423 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:19,676 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-06-05 21:36:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:36:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:19,733 INFO L225 Difference]: With dead ends: 28872 [2021-06-05 21:36:19,733 INFO L226 Difference]: Without dead ends: 28867 [2021-06-05 21:36:19,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-06-05 21:36:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-06-05 21:36:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-06-05 21:36:20,243 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-06-05 21:36:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-06-05 21:36:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-06-05 21:36:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:20,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:20,248 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:20,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-06-05 21:36:20,449 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-06-05 21:36:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:20,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582408225] [2021-06-05 21:36:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:20,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582408225] [2021-06-05 21:36:20,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582408225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885785191] [2021-06-05 21:36:20,520 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:20,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:36:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:20,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885785191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:20,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:20,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:20,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441237051] [2021-06-05 21:36:20,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:20,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:20,583 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:20,845 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-06-05 21:36:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:36:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:20,913 INFO L225 Difference]: With dead ends: 31093 [2021-06-05 21:36:20,914 INFO L226 Difference]: Without dead ends: 31093 [2021-06-05 21:36:20,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:36:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-06-05 21:36:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-06-05 21:36:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-06-05 21:36:21,611 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-06-05 21:36:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:21,611 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-06-05 21:36:21,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-06-05 21:36:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:21,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:21,617 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:21,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-06-05 21:36:21,818 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-06-05 21:36:21,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:21,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482052310] [2021-06-05 21:36:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:21,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482052310] [2021-06-05 21:36:21,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482052310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162767085] [2021-06-05 21:36:21,893 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:21,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162767085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539595389] [2021-06-05 21:36:21,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:21,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:21,953 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:22,262 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-06-05 21:36:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:36:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:22,326 INFO L225 Difference]: With dead ends: 31001 [2021-06-05 21:36:22,327 INFO L226 Difference]: Without dead ends: 30995 [2021-06-05 21:36:22,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-06-05 21:36:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-06-05 21:36:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-06-05 21:36:22,903 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-06-05 21:36:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:22,903 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-06-05 21:36:22,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-06-05 21:36:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:22,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:22,909 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:23,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-06-05 21:36:23,110 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:23,110 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-06-05 21:36:23,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:23,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389519347] [2021-06-05 21:36:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:23,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389519347] [2021-06-05 21:36:23,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389519347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195188736] [2021-06-05 21:36:23,179 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:23,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195188736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:23,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:23,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548589485] [2021-06-05 21:36:23,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:23,251 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:23,584 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-06-05 21:36:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:36:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:23,649 INFO L225 Difference]: With dead ends: 32605 [2021-06-05 21:36:23,650 INFO L226 Difference]: Without dead ends: 32605 [2021-06-05 21:36:23,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:36:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-06-05 21:36:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-06-05 21:36:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-06-05 21:36:24,423 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-06-05 21:36:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:24,424 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-06-05 21:36:24,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-06-05 21:36:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:24,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:24,430 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:24,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-06-05 21:36:24,630 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-06-05 21:36:24,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:24,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212452087] [2021-06-05 21:36:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:36:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212452087] [2021-06-05 21:36:24,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212452087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583377528] [2021-06-05 21:36:24,676 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:24,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:36:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583377528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:24,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:24,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:36:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420935177] [2021-06-05 21:36:24,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:36:24,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:36:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:36:24,739 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:24,954 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-06-05 21:36:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:36:24,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:25,027 INFO L225 Difference]: With dead ends: 32258 [2021-06-05 21:36:25,027 INFO L226 Difference]: Without dead ends: 32258 [2021-06-05 21:36:25,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-06-05 21:36:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-06-05 21:36:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-06-05 21:36:25,619 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-06-05 21:36:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:25,619 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-06-05 21:36:25,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-06-05 21:36:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:25,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:25,626 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:25,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-06-05 21:36:25,826 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:25,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-06-05 21:36:25,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:25,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384056984] [2021-06-05 21:36:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:36:25,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384056984] [2021-06-05 21:36:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384056984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126892339] [2021-06-05 21:36:25,869 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:25,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:36:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:36:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126892339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:25,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:25,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:36:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10945433] [2021-06-05 21:36:25,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:36:25,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:36:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:36:25,928 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:26,207 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-06-05 21:36:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:36:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:26,285 INFO L225 Difference]: With dead ends: 36772 [2021-06-05 21:36:26,285 INFO L226 Difference]: Without dead ends: 36768 [2021-06-05 21:36:26,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-06-05 21:36:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-06-05 21:36:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-06-05 21:36:27,146 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-06-05 21:36:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:27,146 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-06-05 21:36:27,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-06-05 21:36:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:27,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:27,153 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:27,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-06-05 21:36:27,354 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-06-05 21:36:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:27,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868316564] [2021-06-05 21:36:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:27,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:27,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868316564] [2021-06-05 21:36:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868316564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:27,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599590500] [2021-06-05 21:36:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:27,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:36:27,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599590500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:27,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:27,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453667290] [2021-06-05 21:36:27,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:27,462 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:27,704 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-06-05 21:36:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:36:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:27,785 INFO L225 Difference]: With dead ends: 36756 [2021-06-05 21:36:27,785 INFO L226 Difference]: Without dead ends: 36753 [2021-06-05 21:36:27,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:36:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-06-05 21:36:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-06-05 21:36:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-06-05 21:36:28,492 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-06-05 21:36:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:28,492 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-06-05 21:36:28,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-06-05 21:36:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:28,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:28,498 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:28,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-06-05 21:36:28,699 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-06-05 21:36:28,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:28,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723898358] [2021-06-05 21:36:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:28,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:28,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723898358] [2021-06-05 21:36:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723898358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:28,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444478597] [2021-06-05 21:36:28,746 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:28,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:36:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:36:28,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444478597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:28,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:28,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:36:28,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619391036] [2021-06-05 21:36:28,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:36:28,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:36:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:36:28,808 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:29,028 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-06-05 21:36:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:36:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:29,114 INFO L225 Difference]: With dead ends: 38596 [2021-06-05 21:36:29,114 INFO L226 Difference]: Without dead ends: 38596 [2021-06-05 21:36:29,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:36:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-06-05 21:36:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-06-05 21:36:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-06-05 21:36:30,066 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-06-05 21:36:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:30,066 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-06-05 21:36:30,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-06-05 21:36:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:30,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:30,073 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:30,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:30,274 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-06-05 21:36:30,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:30,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789647578] [2021-06-05 21:36:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:30,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:30,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789647578] [2021-06-05 21:36:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789647578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939361231] [2021-06-05 21:36:30,333 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:30,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:36:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:30,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939361231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:30,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:30,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:36:30,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966244288] [2021-06-05 21:36:30,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:30,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:30,401 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:30,720 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-06-05 21:36:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:36:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:30,813 INFO L225 Difference]: With dead ends: 38447 [2021-06-05 21:36:30,813 INFO L226 Difference]: Without dead ends: 38444 [2021-06-05 21:36:30,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-06-05 21:36:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-06-05 21:36:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-06-05 21:36:31,961 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-06-05 21:36:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:31,961 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-06-05 21:36:31,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-06-05 21:36:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:31,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:31,968 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:32,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:32,181 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-06-05 21:36:32,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:32,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119402688] [2021-06-05 21:36:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:32,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119402688] [2021-06-05 21:36:32,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119402688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283286076] [2021-06-05 21:36:32,235 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:32,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:32,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283286076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:32,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:32,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:36:32,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709844210] [2021-06-05 21:36:32,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:32,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:32,295 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:32,648 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-06-05 21:36:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:36:32,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:32,769 INFO L225 Difference]: With dead ends: 47743 [2021-06-05 21:36:32,769 INFO L226 Difference]: Without dead ends: 47743 [2021-06-05 21:36:32,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:36:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-06-05 21:36:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-06-05 21:36:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-06-05 21:36:34,153 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-06-05 21:36:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:34,153 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-06-05 21:36:34,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-06-05 21:36:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:34,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:34,160 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:34,373 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-06-05 21:36:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:34,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808364581] [2021-06-05 21:36:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:34,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:34,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808364581] [2021-06-05 21:36:34,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808364581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:34,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402292169] [2021-06-05 21:36:34,432 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:34,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:34,684 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 21:36:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:34,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402292169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:34,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:34,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:36:34,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127236942] [2021-06-05 21:36:34,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:34,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:34,718 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:35,319 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-06-05 21:36:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:36:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:35,414 INFO L225 Difference]: With dead ends: 46705 [2021-06-05 21:36:35,415 INFO L226 Difference]: Without dead ends: 46701 [2021-06-05 21:36:35,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:36:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-06-05 21:36:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-06-05 21:36:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-06-05 21:36:36,484 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-06-05 21:36:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:36,484 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-06-05 21:36:36,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-06-05 21:36:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:36,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:36,491 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:36,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:36,691 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-06-05 21:36:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:36,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968276107] [2021-06-05 21:36:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:36,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968276107] [2021-06-05 21:36:36,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968276107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458239431] [2021-06-05 21:36:36,745 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:36,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:36:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458239431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:36,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:36,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:36:36,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878905999] [2021-06-05 21:36:36,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:36:36,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:36:36,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:36:36,812 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:37,398 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-06-05 21:36:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:36:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:37,527 INFO L225 Difference]: With dead ends: 49378 [2021-06-05 21:36:37,527 INFO L226 Difference]: Without dead ends: 49378 [2021-06-05 21:36:37,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:36:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-06-05 21:36:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-06-05 21:36:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-06-05 21:36:39,019 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-06-05 21:36:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:39,019 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-06-05 21:36:39,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-06-05 21:36:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:39,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:39,027 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:39,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-06-05 21:36:39,241 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-06-05 21:36:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:39,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851120925] [2021-06-05 21:36:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:39,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851120925] [2021-06-05 21:36:39,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851120925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416501201] [2021-06-05 21:36:39,314 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:39,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:39,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416501201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38664713] [2021-06-05 21:36:39,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:39,379 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:39,990 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-06-05 21:36:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:36:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:40,145 INFO L225 Difference]: With dead ends: 49336 [2021-06-05 21:36:40,146 INFO L226 Difference]: Without dead ends: 49333 [2021-06-05 21:36:40,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:36:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-06-05 21:36:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-06-05 21:36:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-06-05 21:36:41,174 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-06-05 21:36:41,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:41,174 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-06-05 21:36:41,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-06-05 21:36:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:41,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:41,181 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:41,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:41,383 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-06-05 21:36:41,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:41,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861060612] [2021-06-05 21:36:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:41,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861060612] [2021-06-05 21:36:41,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861060612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201287240] [2021-06-05 21:36:41,445 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:41,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:36:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:41,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201287240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:41,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:41,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:41,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417402325] [2021-06-05 21:36:41,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:41,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:41,510 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:42,034 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-06-05 21:36:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:36:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:42,163 INFO L225 Difference]: With dead ends: 55383 [2021-06-05 21:36:42,163 INFO L226 Difference]: Without dead ends: 55383 [2021-06-05 21:36:42,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:36:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-06-05 21:36:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-06-05 21:36:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-06-05 21:36:43,393 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-06-05 21:36:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:43,393 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-06-05 21:36:43,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-06-05 21:36:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:43,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:43,400 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:43,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-06-05 21:36:43,601 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-06-05 21:36:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:43,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253367383] [2021-06-05 21:36:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:43,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253367383] [2021-06-05 21:36:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253367383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152600431] [2021-06-05 21:36:43,667 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:43,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:43,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:43,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152600431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848463203] [2021-06-05 21:36:43,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:43,730 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:44,283 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-06-05 21:36:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:36:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:44,385 INFO L225 Difference]: With dead ends: 46465 [2021-06-05 21:36:44,385 INFO L226 Difference]: Without dead ends: 46461 [2021-06-05 21:36:44,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:36:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-06-05 21:36:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-06-05 21:36:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-06-05 21:36:45,341 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-06-05 21:36:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:45,341 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-06-05 21:36:45,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-06-05 21:36:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:45,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:45,347 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:45,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-06-05 21:36:45,548 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-06-05 21:36:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:45,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075191144] [2021-06-05 21:36:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:45,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075191144] [2021-06-05 21:36:45,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075191144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173590179] [2021-06-05 21:36:45,607 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:45,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173590179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:45,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:45,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658166348] [2021-06-05 21:36:45,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:45,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:45,667 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:45,975 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-06-05 21:36:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:36:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:45,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:46,104 INFO L225 Difference]: With dead ends: 53081 [2021-06-05 21:36:46,105 INFO L226 Difference]: Without dead ends: 53081 [2021-06-05 21:36:46,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:36:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-06-05 21:36:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-06-05 21:36:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-06-05 21:36:47,473 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-06-05 21:36:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:47,473 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-06-05 21:36:47,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-06-05 21:36:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:47,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:47,481 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:47,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-06-05 21:36:47,682 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-06-05 21:36:47,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:47,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147478990] [2021-06-05 21:36:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:47,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:47,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147478990] [2021-06-05 21:36:47,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147478990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:47,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072287769] [2021-06-05 21:36:47,751 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:47,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:47,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:47,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072287769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:47,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:47,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583487477] [2021-06-05 21:36:47,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:47,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:47,817 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:48,248 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-06-05 21:36:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:36:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:48,390 INFO L225 Difference]: With dead ends: 50456 [2021-06-05 21:36:48,390 INFO L226 Difference]: Without dead ends: 50451 [2021-06-05 21:36:48,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:36:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-06-05 21:36:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-06-05 21:36:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-06-05 21:36:49,930 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-06-05 21:36:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:49,930 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-06-05 21:36:49,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-06-05 21:36:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:49,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:49,937 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:50,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-06-05 21:36:50,153 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-06-05 21:36:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:50,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565990576] [2021-06-05 21:36:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:50,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:50,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565990576] [2021-06-05 21:36:50,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565990576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:50,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593164529] [2021-06-05 21:36:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:50,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:36:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:36:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593164529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:36:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399192631] [2021-06-05 21:36:50,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:36:50,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:50,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:36:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:36:50,279 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:50,690 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-06-05 21:36:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:50,832 INFO L225 Difference]: With dead ends: 51683 [2021-06-05 21:36:50,832 INFO L226 Difference]: Without dead ends: 51683 [2021-06-05 21:36:50,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:36:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-06-05 21:36:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-06-05 21:36:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-06-05 21:36:52,120 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-06-05 21:36:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:52,120 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-06-05 21:36:52,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-06-05 21:36:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:52,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:52,127 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:52,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-06-05 21:36:52,343 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:52,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-06-05 21:36:52,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:52,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885333053] [2021-06-05 21:36:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885333053] [2021-06-05 21:36:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885333053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035399258] [2021-06-05 21:36:52,910 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:52,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:36:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:52,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035399258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:52,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:52,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:52,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684856709] [2021-06-05 21:36:52,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:52,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:52,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:52,970 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:53,397 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-06-05 21:36:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:53,528 INFO L225 Difference]: With dead ends: 51540 [2021-06-05 21:36:53,529 INFO L226 Difference]: Without dead ends: 51537 [2021-06-05 21:36:53,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:36:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-06-05 21:36:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-06-05 21:36:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-06-05 21:36:54,855 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-06-05 21:36:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:54,855 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-06-05 21:36:54,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-06-05 21:36:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:54,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:54,863 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:55,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-06-05 21:36:55,069 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-06-05 21:36:55,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:55,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629588953] [2021-06-05 21:36:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:55,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629588953] [2021-06-05 21:36:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629588953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679194225] [2021-06-05 21:36:55,142 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:55,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:36:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:55,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679194225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:55,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:55,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:55,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591544988] [2021-06-05 21:36:55,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:55,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:55,205 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:55,770 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-06-05 21:36:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:36:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:55,908 INFO L225 Difference]: With dead ends: 54243 [2021-06-05 21:36:55,908 INFO L226 Difference]: Without dead ends: 54243 [2021-06-05 21:36:55,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:36:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-06-05 21:36:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-06-05 21:36:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-06-05 21:36:56,594 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-06-05 21:36:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:56,594 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-06-05 21:36:56,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-06-05 21:36:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:56,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:56,600 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:56,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:56,801 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-06-05 21:36:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:56,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901786315] [2021-06-05 21:36:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:57,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901786315] [2021-06-05 21:36:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901786315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555130780] [2021-06-05 21:36:57,022 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:57,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:36:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:57,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555130780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:57,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:57,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:57,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301595123] [2021-06-05 21:36:57,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:57,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:57,079 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:57,337 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-06-05 21:36:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:36:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:57,376 INFO L225 Difference]: With dead ends: 20359 [2021-06-05 21:36:57,376 INFO L226 Difference]: Without dead ends: 20355 [2021-06-05 21:36:57,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-06-05 21:36:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-06-05 21:36:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-06-05 21:36:57,737 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-06-05 21:36:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:57,738 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-06-05 21:36:57,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-06-05 21:36:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:57,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:57,744 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:57,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:57,945 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-06-05 21:36:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477025089] [2021-06-05 21:36:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:58,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:58,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477025089] [2021-06-05 21:36:58,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477025089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:58,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810034134] [2021-06-05 21:36:58,007 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:58,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810034134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:58,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282628877] [2021-06-05 21:36:58,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:58,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:58,068 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:58,266 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-06-05 21:36:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:36:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:58,323 INFO L225 Difference]: With dead ends: 28252 [2021-06-05 21:36:58,323 INFO L226 Difference]: Without dead ends: 28252 [2021-06-05 21:36:58,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:36:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-06-05 21:36:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-06-05 21:36:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-06-05 21:36:58,861 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-06-05 21:36:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:58,861 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-06-05 21:36:58,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-06-05 21:36:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:58,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:58,868 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:36:59,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:59,068 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:36:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:36:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-06-05 21:36:59,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:36:59,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660110804] [2021-06-05 21:36:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:36:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:36:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:59,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:36:59,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660110804] [2021-06-05 21:36:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660110804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:59,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166406984] [2021-06-05 21:36:59,143 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:36:59,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:36:59,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:36:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:36:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:36:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:36:59,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166406984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:36:59,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:36:59,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:36:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522310224] [2021-06-05 21:36:59,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:36:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:36:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:36:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:36:59,205 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:36:59,454 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-06-05 21:36:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:36:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:36:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:36:59,496 INFO L225 Difference]: With dead ends: 20123 [2021-06-05 21:36:59,496 INFO L226 Difference]: Without dead ends: 20118 [2021-06-05 21:36:59,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:36:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-06-05 21:36:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-06-05 21:36:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-06-05 21:36:59,985 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-06-05 21:36:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:36:59,985 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-06-05 21:36:59,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:36:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-06-05 21:36:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:36:59,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:36:59,992 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:00,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:00,192 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-06-05 21:37:00,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:00,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891401829] [2021-06-05 21:37:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:00,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891401829] [2021-06-05 21:37:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891401829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:00,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767924325] [2021-06-05 21:37:00,264 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:00,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:37:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:00,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767924325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:00,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:00,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038371998] [2021-06-05 21:37:00,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:00,328 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:00,545 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-06-05 21:37:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:00,581 INFO L225 Difference]: With dead ends: 21427 [2021-06-05 21:37:00,582 INFO L226 Difference]: Without dead ends: 21427 [2021-06-05 21:37:00,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:37:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-06-05 21:37:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-06-05 21:37:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-06-05 21:37:00,956 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-06-05 21:37:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:00,956 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-06-05 21:37:00,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-06-05 21:37:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:00,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:00,962 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:01,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-06-05 21:37:01,162 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-06-05 21:37:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:01,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232480988] [2021-06-05 21:37:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:01,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:01,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232480988] [2021-06-05 21:37:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232480988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:01,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758580599] [2021-06-05 21:37:01,243 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:01,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:01,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758580599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:01,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:01,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:01,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402544926] [2021-06-05 21:37:01,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:01,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:01,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:01,300 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:01,579 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-06-05 21:37:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:37:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:01,617 INFO L225 Difference]: With dead ends: 20188 [2021-06-05 21:37:01,617 INFO L226 Difference]: Without dead ends: 20182 [2021-06-05 21:37:01,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:37:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-06-05 21:37:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-06-05 21:37:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-06-05 21:37:01,976 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-06-05 21:37:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:01,977 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-06-05 21:37:01,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-06-05 21:37:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:01,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:01,983 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:02,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:02,183 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-06-05 21:37:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:02,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619531364] [2021-06-05 21:37:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619531364] [2021-06-05 21:37:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619531364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344039175] [2021-06-05 21:37:02,278 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:02,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344039175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:02,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:02,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:02,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891396379] [2021-06-05 21:37:02,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:02,342 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:02,661 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-06-05 21:37:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:37:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:02,700 INFO L225 Difference]: With dead ends: 20611 [2021-06-05 21:37:02,700 INFO L226 Difference]: Without dead ends: 20611 [2021-06-05 21:37:02,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:37:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-06-05 21:37:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-06-05 21:37:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-06-05 21:37:03,129 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-06-05 21:37:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:03,129 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-06-05 21:37:03,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-06-05 21:37:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:03,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:03,135 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:03,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-06-05 21:37:03,336 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-06-05 21:37:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:03,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199024971] [2021-06-05 21:37:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:03,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199024971] [2021-06-05 21:37:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199024971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47415608] [2021-06-05 21:37:03,397 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:03,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:37:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:03,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47415608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:03,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:03,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803631186] [2021-06-05 21:37:03,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:03,467 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:03,695 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-06-05 21:37:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:03,741 INFO L225 Difference]: With dead ends: 19840 [2021-06-05 21:37:03,742 INFO L226 Difference]: Without dead ends: 19840 [2021-06-05 21:37:03,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-06-05 21:37:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-06-05 21:37:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-06-05 21:37:04,078 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-06-05 21:37:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:04,078 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-06-05 21:37:04,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-06-05 21:37:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:04,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:04,084 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:04,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-06-05 21:37:04,285 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-06-05 21:37:04,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:04,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950984515] [2021-06-05 21:37:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:04,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:04,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950984515] [2021-06-05 21:37:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950984515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:04,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492122451] [2021-06-05 21:37:04,445 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:04,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492122451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:04,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:04,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:04,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293211582] [2021-06-05 21:37:04,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:04,512 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:04,731 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-06-05 21:37:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:04,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:04,765 INFO L225 Difference]: With dead ends: 19868 [2021-06-05 21:37:04,765 INFO L226 Difference]: Without dead ends: 19864 [2021-06-05 21:37:04,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-06-05 21:37:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-06-05 21:37:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-06-05 21:37:05,070 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-06-05 21:37:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:05,070 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-06-05 21:37:05,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-06-05 21:37:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:05,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:05,075 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:05,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-06-05 21:37:05,276 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-06-05 21:37:05,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:05,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502927409] [2021-06-05 21:37:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:05,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502927409] [2021-06-05 21:37:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502927409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719617561] [2021-06-05 21:37:05,339 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:05,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:05,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719617561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:05,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:05,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065221873] [2021-06-05 21:37:05,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:05,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:05,414 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:05,623 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-06-05 21:37:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:05,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:05,654 INFO L225 Difference]: With dead ends: 18321 [2021-06-05 21:37:05,654 INFO L226 Difference]: Without dead ends: 18320 [2021-06-05 21:37:05,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-06-05 21:37:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-06-05 21:37:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-06-05 21:37:06,025 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-06-05 21:37:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:06,025 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-06-05 21:37:06,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-06-05 21:37:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:06,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:06,031 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:06,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-06-05 21:37:06,231 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:06,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-06-05 21:37:06,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:06,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219880144] [2021-06-05 21:37:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:06,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:06,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219880144] [2021-06-05 21:37:06,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219880144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:06,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021059677] [2021-06-05 21:37:06,288 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:06,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021059677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:06,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:06,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754410664] [2021-06-05 21:37:06,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:06,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:06,351 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:06,468 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-06-05 21:37:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:37:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:06,500 INFO L225 Difference]: With dead ends: 18502 [2021-06-05 21:37:06,500 INFO L226 Difference]: Without dead ends: 18502 [2021-06-05 21:37:06,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-06-05 21:37:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-06-05 21:37:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-06-05 21:37:06,789 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-06-05 21:37:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-06-05 21:37:06,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-06-05 21:37:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:06,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:06,795 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:06,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:06,995 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:06,996 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-06-05 21:37:06,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:06,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058303808] [2021-06-05 21:37:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058303808] [2021-06-05 21:37:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058303808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786649706] [2021-06-05 21:37:07,053 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:07,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:07,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786649706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:07,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:07,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:07,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188250482] [2021-06-05 21:37:07,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:07,136 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:07,411 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-06-05 21:37:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:07,441 INFO L225 Difference]: With dead ends: 18306 [2021-06-05 21:37:07,441 INFO L226 Difference]: Without dead ends: 18304 [2021-06-05 21:37:07,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-05 21:37:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-06-05 21:37:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-06-05 21:37:07,724 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-06-05 21:37:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:07,724 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-06-05 21:37:07,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-06-05 21:37:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:07,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:07,730 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:07,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:07,930 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-06-05 21:37:07,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:07,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379143546] [2021-06-05 21:37:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:07,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379143546] [2021-06-05 21:37:07,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379143546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615835565] [2021-06-05 21:37:07,991 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:08,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:08,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615835565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:08,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:08,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209397876] [2021-06-05 21:37:08,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:08,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:08,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:08,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:08,058 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:08,181 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-06-05 21:37:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:08,212 INFO L225 Difference]: With dead ends: 18305 [2021-06-05 21:37:08,212 INFO L226 Difference]: Without dead ends: 18305 [2021-06-05 21:37:08,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-06-05 21:37:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-06-05 21:37:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-06-05 21:37:08,493 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-06-05 21:37:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:08,493 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-06-05 21:37:08,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-06-05 21:37:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:08,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:08,499 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:08,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,700 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-06-05 21:37:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547090678] [2021-06-05 21:37:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:08,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547090678] [2021-06-05 21:37:08,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547090678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96542468] [2021-06-05 21:37:08,767 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:08,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:37:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:08,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96542468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:08,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:08,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47787142] [2021-06-05 21:37:08,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:08,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:08,830 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:09,058 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-06-05 21:37:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:37:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:09,086 INFO L225 Difference]: With dead ends: 17705 [2021-06-05 21:37:09,086 INFO L226 Difference]: Without dead ends: 17702 [2021-06-05 21:37:09,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-06-05 21:37:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-06-05 21:37:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-06-05 21:37:09,424 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-06-05 21:37:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:09,425 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-06-05 21:37:09,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-06-05 21:37:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:09,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:09,430 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:09,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:09,630 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-06-05 21:37:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:09,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586021267] [2021-06-05 21:37:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:09,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:09,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586021267] [2021-06-05 21:37:09,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586021267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455356853] [2021-06-05 21:37:09,694 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455356853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:09,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:09,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724108433] [2021-06-05 21:37:09,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:09,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:09,760 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:09,908 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-06-05 21:37:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:09,939 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 21:37:09,939 INFO L226 Difference]: Without dead ends: 18492 [2021-06-05 21:37:09,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:37:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-06-05 21:37:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-06-05 21:37:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-06-05 21:37:10,226 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-06-05 21:37:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:10,227 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-06-05 21:37:10,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-06-05 21:37:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:10,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:10,232 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:10,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:10,433 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-06-05 21:37:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:10,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277756054] [2021-06-05 21:37:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:10,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277756054] [2021-06-05 21:37:10,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277756054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163093426] [2021-06-05 21:37:10,499 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:10,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:10,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:10,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163093426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:10,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:10,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:10,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835260184] [2021-06-05 21:37:10,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:10,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:10,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:10,560 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:10,781 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-06-05 21:37:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:37:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:10,811 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 21:37:10,811 INFO L226 Difference]: Without dead ends: 18161 [2021-06-05 21:37:10,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-06-05 21:37:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-06-05 21:37:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-06-05 21:37:11,092 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-06-05 21:37:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:11,092 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-06-05 21:37:11,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-06-05 21:37:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:11,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:11,098 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:11,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:11,298 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-06-05 21:37:11,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:11,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767280060] [2021-06-05 21:37:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:11,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767280060] [2021-06-05 21:37:11,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767280060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562189593] [2021-06-05 21:37:11,363 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:11,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:37:11,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562189593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:11,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:11,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:11,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984852321] [2021-06-05 21:37:11,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:11,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:11,440 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:11,606 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-06-05 21:37:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:11,646 INFO L225 Difference]: With dead ends: 23520 [2021-06-05 21:37:11,646 INFO L226 Difference]: Without dead ends: 23520 [2021-06-05 21:37:11,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:37:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-06-05 21:37:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-06-05 21:37:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-06-05 21:37:12,025 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-06-05 21:37:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:12,025 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-06-05 21:37:12,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-06-05 21:37:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:12,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:12,031 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:12,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-06-05 21:37:12,233 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-06-05 21:37:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:12,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510691515] [2021-06-05 21:37:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510691515] [2021-06-05 21:37:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510691515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272257761] [2021-06-05 21:37:12,301 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:12,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:12,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:12,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272257761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:12,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:12,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:12,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048354607] [2021-06-05 21:37:12,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:12,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:12,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:12,365 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:12,600 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-06-05 21:37:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:12,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:12,632 INFO L225 Difference]: With dead ends: 19410 [2021-06-05 21:37:12,632 INFO L226 Difference]: Without dead ends: 19405 [2021-06-05 21:37:12,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-06-05 21:37:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-06-05 21:37:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-06-05 21:37:12,932 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-06-05 21:37:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:12,932 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-06-05 21:37:12,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-06-05 21:37:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:12,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:12,938 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:13,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-06-05 21:37:13,138 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-06-05 21:37:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:13,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260878912] [2021-06-05 21:37:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:13,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260878912] [2021-06-05 21:37:13,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260878912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549508962] [2021-06-05 21:37:13,203 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:13,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:37:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:13,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:13,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549508962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:13,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:13,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:13,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964644219] [2021-06-05 21:37:13,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:13,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:13,269 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:13,451 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-06-05 21:37:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:37:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:13,487 INFO L225 Difference]: With dead ends: 20745 [2021-06-05 21:37:13,487 INFO L226 Difference]: Without dead ends: 20745 [2021-06-05 21:37:13,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-06-05 21:37:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-06-05 21:37:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-06-05 21:37:13,805 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-06-05 21:37:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:13,805 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-06-05 21:37:13,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-06-05 21:37:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:13,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:13,811 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:14,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-06-05 21:37:14,011 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-06-05 21:37:14,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:14,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245209360] [2021-06-05 21:37:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245209360] [2021-06-05 21:37:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245209360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821792683] [2021-06-05 21:37:14,082 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:14,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:14,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821792683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:14,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:14,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:14,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680974324] [2021-06-05 21:37:14,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:14,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:14,145 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:14,387 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-06-05 21:37:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:14,422 INFO L225 Difference]: With dead ends: 20239 [2021-06-05 21:37:14,422 INFO L226 Difference]: Without dead ends: 20233 [2021-06-05 21:37:14,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-05 21:37:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-06-05 21:37:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-06-05 21:37:14,806 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-06-05 21:37:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:14,806 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-06-05 21:37:14,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-06-05 21:37:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:14,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:14,812 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:15,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-06-05 21:37:15,012 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:15,013 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-06-05 21:37:15,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:15,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243245855] [2021-06-05 21:37:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:15,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243245855] [2021-06-05 21:37:15,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243245855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559851216] [2021-06-05 21:37:15,081 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:15,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:15,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559851216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:15,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:15,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:15,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83704522] [2021-06-05 21:37:15,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:15,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:15,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:15,146 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:15,394 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-06-05 21:37:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:15,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:15,431 INFO L225 Difference]: With dead ends: 20573 [2021-06-05 21:37:15,431 INFO L226 Difference]: Without dead ends: 20573 [2021-06-05 21:37:15,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:37:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-06-05 21:37:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-06-05 21:37:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-06-05 21:37:15,755 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-06-05 21:37:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:15,755 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-06-05 21:37:15,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-06-05 21:37:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:15,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:15,760 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:15,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-06-05 21:37:15,961 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-06-05 21:37:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:15,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732750732] [2021-06-05 21:37:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:16,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732750732] [2021-06-05 21:37:16,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732750732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592842828] [2021-06-05 21:37:16,038 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:16,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:16,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592842828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100104801] [2021-06-05 21:37:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:16,100 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:16,355 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-06-05 21:37:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:16,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:16,392 INFO L225 Difference]: With dead ends: 20348 [2021-06-05 21:37:16,392 INFO L226 Difference]: Without dead ends: 20341 [2021-06-05 21:37:16,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:37:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-06-05 21:37:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-06-05 21:37:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-06-05 21:37:16,730 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-06-05 21:37:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:16,730 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-06-05 21:37:16,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-06-05 21:37:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:16,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:16,736 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:16,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:16,937 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-06-05 21:37:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:16,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640727607] [2021-06-05 21:37:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:17,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640727607] [2021-06-05 21:37:17,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640727607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726221235] [2021-06-05 21:37:17,010 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:17,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:17,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726221235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:17,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:17,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:17,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100682150] [2021-06-05 21:37:17,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:17,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:17,078 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:17,447 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-06-05 21:37:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:37:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:17,482 INFO L225 Difference]: With dead ends: 21105 [2021-06-05 21:37:17,483 INFO L226 Difference]: Without dead ends: 21105 [2021-06-05 21:37:17,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:37:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-06-05 21:37:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-06-05 21:37:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-06-05 21:37:17,818 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-06-05 21:37:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:17,818 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-06-05 21:37:17,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-06-05 21:37:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:17,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:17,824 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:18,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,025 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-06-05 21:37:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398532262] [2021-06-05 21:37:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:18,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398532262] [2021-06-05 21:37:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398532262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751694119] [2021-06-05 21:37:18,074 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:18,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:18,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751694119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:18,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:18,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415654186] [2021-06-05 21:37:18,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:18,137 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:18,357 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-06-05 21:37:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:18,393 INFO L225 Difference]: With dead ends: 20897 [2021-06-05 21:37:18,393 INFO L226 Difference]: Without dead ends: 20897 [2021-06-05 21:37:18,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-06-05 21:37:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-06-05 21:37:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-06-05 21:37:18,730 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-06-05 21:37:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:18,730 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-06-05 21:37:18,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-06-05 21:37:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:18,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:18,737 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:18,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:18,937 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:18,938 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-06-05 21:37:18,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:18,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078425107] [2021-06-05 21:37:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:18,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:18,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078425107] [2021-06-05 21:37:18,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078425107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:18,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25952767] [2021-06-05 21:37:18,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:19,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:19,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:19,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:37:19,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25952767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:19,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:19,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:37:19,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006307056] [2021-06-05 21:37:19,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:37:19,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:37:19,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:37:19,040 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:19,286 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-06-05 21:37:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:19,342 INFO L225 Difference]: With dead ends: 25212 [2021-06-05 21:37:19,342 INFO L226 Difference]: Without dead ends: 25208 [2021-06-05 21:37:19,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-06-05 21:37:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-06-05 21:37:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-06-05 21:37:19,790 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-06-05 21:37:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:19,791 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-06-05 21:37:19,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-06-05 21:37:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:19,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:19,797 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:19,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:19,997 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-06-05 21:37:19,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:19,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895483479] [2021-06-05 21:37:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:20,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895483479] [2021-06-05 21:37:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895483479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643265439] [2021-06-05 21:37:20,053 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:20,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:37:20,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:20,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643265439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:20,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:20,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113819952] [2021-06-05 21:37:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:20,110 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:20,329 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-06-05 21:37:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:20,375 INFO L225 Difference]: With dead ends: 23865 [2021-06-05 21:37:20,375 INFO L226 Difference]: Without dead ends: 23861 [2021-06-05 21:37:20,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-06-05 21:37:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-06-05 21:37:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-06-05 21:37:20,790 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-06-05 21:37:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-06-05 21:37:20,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-06-05 21:37:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:20,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:20,796 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:20,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-06-05 21:37:20,996 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-06-05 21:37:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207439967] [2021-06-05 21:37:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:21,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:21,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207439967] [2021-06-05 21:37:21,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207439967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364615369] [2021-06-05 21:37:21,049 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:21,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:37:21,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364615369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:21,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:21,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:37:21,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704736815] [2021-06-05 21:37:21,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:37:21,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:21,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:37:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:37:21,111 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:21,317 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-06-05 21:37:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:21,366 INFO L225 Difference]: With dead ends: 26766 [2021-06-05 21:37:21,367 INFO L226 Difference]: Without dead ends: 26766 [2021-06-05 21:37:21,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-06-05 21:37:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-06-05 21:37:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-06-05 21:37:21,815 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-06-05 21:37:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:21,815 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-06-05 21:37:21,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-06-05 21:37:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:21,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:21,821 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:22,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-06-05 21:37:22,022 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-06-05 21:37:22,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:22,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39153688] [2021-06-05 21:37:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:22,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:22,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39153688] [2021-06-05 21:37:22,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39153688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649309507] [2021-06-05 21:37:22,081 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:22,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:22,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649309507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:22,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:22,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049810148] [2021-06-05 21:37:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:22,139 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:22,373 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-06-05 21:37:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:22,430 INFO L225 Difference]: With dead ends: 26395 [2021-06-05 21:37:22,430 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 21:37:22,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 21:37:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-06-05 21:37:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-06-05 21:37:22,988 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-06-05 21:37:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:22,988 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-06-05 21:37:22,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-06-05 21:37:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:22,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:22,994 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:23,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-06-05 21:37:23,195 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-06-05 21:37:23,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:23,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066246226] [2021-06-05 21:37:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:23,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:23,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066246226] [2021-06-05 21:37:23,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066246226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037187989] [2021-06-05 21:37:23,250 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:23,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:37:23,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:23,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037187989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:23,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:23,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:23,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534726202] [2021-06-05 21:37:23,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:23,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:23,314 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:23,532 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-06-05 21:37:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:23,593 INFO L225 Difference]: With dead ends: 28931 [2021-06-05 21:37:23,593 INFO L226 Difference]: Without dead ends: 28931 [2021-06-05 21:37:23,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-06-05 21:37:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-06-05 21:37:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-06-05 21:37:24,074 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-06-05 21:37:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:24,074 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-06-05 21:37:24,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-06-05 21:37:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:24,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:24,080 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:24,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-06-05 21:37:24,285 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-06-05 21:37:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:24,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944626629] [2021-06-05 21:37:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944626629] [2021-06-05 21:37:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944626629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129763677] [2021-06-05 21:37:24,347 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:24,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:24,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:24,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129763677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:24,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149840568] [2021-06-05 21:37:24,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:24,409 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:24,690 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-06-05 21:37:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:37:24,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:24,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:24,758 INFO L225 Difference]: With dead ends: 25641 [2021-06-05 21:37:24,758 INFO L226 Difference]: Without dead ends: 25636 [2021-06-05 21:37:24,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-06-05 21:37:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-06-05 21:37:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-06-05 21:37:25,305 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-06-05 21:37:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:25,305 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-06-05 21:37:25,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-06-05 21:37:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:25,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:25,312 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:25,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-06-05 21:37:25,513 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-06-05 21:37:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463835711] [2021-06-05 21:37:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:25,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463835711] [2021-06-05 21:37:25,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463835711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657993171] [2021-06-05 21:37:25,593 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:25,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:25,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657993171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:25,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:25,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662459429] [2021-06-05 21:37:25,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:25,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:25,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:25,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:25,660 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:26,005 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-06-05 21:37:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:26,067 INFO L225 Difference]: With dead ends: 28403 [2021-06-05 21:37:26,067 INFO L226 Difference]: Without dead ends: 28403 [2021-06-05 21:37:26,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-06-05 21:37:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-06-05 21:37:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-06-05 21:37:26,657 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-06-05 21:37:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:26,657 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-06-05 21:37:26,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-06-05 21:37:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:26,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:26,665 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:26,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-06-05 21:37:26,865 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-06-05 21:37:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:26,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951371972] [2021-06-05 21:37:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:26,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:26,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951371972] [2021-06-05 21:37:26,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951371972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683738065] [2021-06-05 21:37:26,929 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:26,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:37:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:26,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683738065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:26,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:26,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:26,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025690237] [2021-06-05 21:37:26,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:26,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:26,987 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:27,230 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-06-05 21:37:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:27,285 INFO L225 Difference]: With dead ends: 28254 [2021-06-05 21:37:27,285 INFO L226 Difference]: Without dead ends: 28250 [2021-06-05 21:37:27,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-06-05 21:37:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-06-05 21:37:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-06-05 21:37:27,846 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-06-05 21:37:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:27,846 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-06-05 21:37:27,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-06-05 21:37:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:27,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:27,854 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:28,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:28,070 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-06-05 21:37:28,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:28,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999551227] [2021-06-05 21:37:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999551227] [2021-06-05 21:37:28,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999551227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455979860] [2021-06-05 21:37:28,136 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:28,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455979860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:28,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:28,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:28,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057670357] [2021-06-05 21:37:28,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:28,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:28,206 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:28,480 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-06-05 21:37:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:28,546 INFO L225 Difference]: With dead ends: 30857 [2021-06-05 21:37:28,546 INFO L226 Difference]: Without dead ends: 30857 [2021-06-05 21:37:28,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-06-05 21:37:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-06-05 21:37:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-06-05 21:37:29,085 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-06-05 21:37:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:29,086 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-06-05 21:37:29,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-06-05 21:37:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:29,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:29,092 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:29,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-06-05 21:37:29,293 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-06-05 21:37:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:29,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848109295] [2021-06-05 21:37:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:29,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848109295] [2021-06-05 21:37:29,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848109295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934674924] [2021-06-05 21:37:29,365 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:29,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:29,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:29,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934674924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:29,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:29,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:29,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005496091] [2021-06-05 21:37:29,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:29,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:29,427 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:29,705 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-06-05 21:37:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:29,750 INFO L225 Difference]: With dead ends: 23497 [2021-06-05 21:37:29,750 INFO L226 Difference]: Without dead ends: 23492 [2021-06-05 21:37:29,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-06-05 21:37:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-06-05 21:37:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-06-05 21:37:30,217 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-06-05 21:37:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:30,217 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-06-05 21:37:30,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-06-05 21:37:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:30,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:30,224 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:30,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:30,424 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-06-05 21:37:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:30,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343229416] [2021-06-05 21:37:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:30,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:30,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343229416] [2021-06-05 21:37:30,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343229416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672726613] [2021-06-05 21:37:30,491 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:30,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:30,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672726613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:30,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:30,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985754275] [2021-06-05 21:37:30,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:30,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:30,557 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:30,826 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-06-05 21:37:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:30,879 INFO L225 Difference]: With dead ends: 26246 [2021-06-05 21:37:30,879 INFO L226 Difference]: Without dead ends: 26246 [2021-06-05 21:37:30,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:37:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-06-05 21:37:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-06-05 21:37:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-06-05 21:37:31,378 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-06-05 21:37:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:31,378 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-06-05 21:37:31,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-06-05 21:37:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:31,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:31,384 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:31,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:31,585 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-06-05 21:37:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:31,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809668206] [2021-06-05 21:37:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:31,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:31,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809668206] [2021-06-05 21:37:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809668206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664224842] [2021-06-05 21:37:31,661 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:31,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:31,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:31,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:31,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664224842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:31,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:31,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:31,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492995216] [2021-06-05 21:37:31,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:31,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:31,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:31,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:31,721 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:32,006 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-06-05 21:37:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:37:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:32,068 INFO L225 Difference]: With dead ends: 23615 [2021-06-05 21:37:32,068 INFO L226 Difference]: Without dead ends: 23609 [2021-06-05 21:37:32,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-06-05 21:37:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-06-05 21:37:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-06-05 21:37:32,530 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-06-05 21:37:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:32,530 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-06-05 21:37:32,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-06-05 21:37:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:32,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:32,537 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:32,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,737 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-06-05 21:37:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147240595] [2021-06-05 21:37:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147240595] [2021-06-05 21:37:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147240595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942257914] [2021-06-05 21:37:32,810 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:32,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:32,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:32,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942257914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:32,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:32,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:37:32,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881105716] [2021-06-05 21:37:32,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:32,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:32,878 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:33,239 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-06-05 21:37:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:37:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:33,293 INFO L225 Difference]: With dead ends: 24953 [2021-06-05 21:37:33,293 INFO L226 Difference]: Without dead ends: 24953 [2021-06-05 21:37:33,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:37:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-06-05 21:37:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-06-05 21:37:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-06-05 21:37:33,742 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-06-05 21:37:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:33,742 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-06-05 21:37:33,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-06-05 21:37:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:33,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:33,748 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:33,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:33,949 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-06-05 21:37:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:33,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314336477] [2021-06-05 21:37:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:34,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:34,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314336477] [2021-06-05 21:37:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314336477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712654250] [2021-06-05 21:37:34,015 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:34,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:37:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:34,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712654250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:34,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099476205] [2021-06-05 21:37:34,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:34,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:34,079 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:34,400 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-06-05 21:37:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:34,453 INFO L225 Difference]: With dead ends: 24826 [2021-06-05 21:37:34,453 INFO L226 Difference]: Without dead ends: 24822 [2021-06-05 21:37:34,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-06-05 21:37:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-06-05 21:37:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-06-05 21:37:34,977 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-06-05 21:37:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:34,977 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-06-05 21:37:34,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-06-05 21:37:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:34,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:34,984 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:35,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-06-05 21:37:35,185 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-06-05 21:37:35,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:35,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212755858] [2021-06-05 21:37:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:35,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212755858] [2021-06-05 21:37:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212755858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487430856] [2021-06-05 21:37:35,252 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487430856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:35,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:35,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082338817] [2021-06-05 21:37:35,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:35,332 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:35,578 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-06-05 21:37:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:35,635 INFO L225 Difference]: With dead ends: 25900 [2021-06-05 21:37:35,635 INFO L226 Difference]: Without dead ends: 25900 [2021-06-05 21:37:35,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-05 21:37:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-06-05 21:37:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-06-05 21:37:36,109 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-06-05 21:37:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:36,109 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-06-05 21:37:36,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-06-05 21:37:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:36,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:36,116 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:36,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,325 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-06-05 21:37:36,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:36,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847655015] [2021-06-05 21:37:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:36,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:36,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847655015] [2021-06-05 21:37:36,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847655015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338343590] [2021-06-05 21:37:36,402 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:36,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:36,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338343590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:36,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:36,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080181671] [2021-06-05 21:37:36,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:36,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:36,469 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:36,775 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-06-05 21:37:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:37:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:36,812 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 21:37:36,812 INFO L226 Difference]: Without dead ends: 19106 [2021-06-05 21:37:36,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-06-05 21:37:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-06-05 21:37:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-06-05 21:37:37,230 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-06-05 21:37:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:37,230 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-06-05 21:37:37,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-06-05 21:37:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:37,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:37,237 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:37,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-06-05 21:37:37,453 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-06-05 21:37:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:37,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210785186] [2021-06-05 21:37:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210785186] [2021-06-05 21:37:37,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210785186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154778151] [2021-06-05 21:37:37,519 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:37,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:37,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154778151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:37,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:37,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931878555] [2021-06-05 21:37:37,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:37,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:37,589 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:37,797 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-06-05 21:37:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:37,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:37,837 INFO L225 Difference]: With dead ends: 22104 [2021-06-05 21:37:37,838 INFO L226 Difference]: Without dead ends: 22104 [2021-06-05 21:37:37,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-06-05 21:37:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-06-05 21:37:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-06-05 21:37:38,192 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-06-05 21:37:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:38,192 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-06-05 21:37:38,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-06-05 21:37:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:38,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:38,198 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:38,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-06-05 21:37:38,413 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-06-05 21:37:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:38,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215764937] [2021-06-05 21:37:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215764937] [2021-06-05 21:37:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215764937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290406297] [2021-06-05 21:37:38,494 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:38,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290406297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:38,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:38,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:38,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692249091] [2021-06-05 21:37:38,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:38,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:38,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:38,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:38,560 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:38,815 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-06-05 21:37:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:38,848 INFO L225 Difference]: With dead ends: 18689 [2021-06-05 21:37:38,848 INFO L226 Difference]: Without dead ends: 18683 [2021-06-05 21:37:38,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-06-05 21:37:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-06-05 21:37:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-06-05 21:37:39,175 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-06-05 21:37:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:39,175 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-06-05 21:37:39,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-06-05 21:37:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:39,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:39,181 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:39,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,382 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-06-05 21:37:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:39,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965555507] [2021-06-05 21:37:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:39,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:39,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965555507] [2021-06-05 21:37:39,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965555507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268395503] [2021-06-05 21:37:39,448 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:39,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268395503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:39,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:39,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:39,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891366891] [2021-06-05 21:37:39,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:39,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:39,523 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:39,784 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-06-05 21:37:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:39,819 INFO L225 Difference]: With dead ends: 19170 [2021-06-05 21:37:39,819 INFO L226 Difference]: Without dead ends: 19170 [2021-06-05 21:37:39,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:37:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-06-05 21:37:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-06-05 21:37:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-06-05 21:37:40,141 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-06-05 21:37:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:40,141 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-06-05 21:37:40,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-06-05 21:37:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:40,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:40,147 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:40,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-06-05 21:37:40,348 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-06-05 21:37:40,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:40,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610654155] [2021-06-05 21:37:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:40,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610654155] [2021-06-05 21:37:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610654155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132504428] [2021-06-05 21:37:40,422 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:40,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:40,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132504428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:40,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:40,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:40,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101634186] [2021-06-05 21:37:40,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:40,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:40,486 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:40,746 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-06-05 21:37:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:40,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:40,776 INFO L225 Difference]: With dead ends: 18240 [2021-06-05 21:37:40,776 INFO L226 Difference]: Without dead ends: 18233 [2021-06-05 21:37:40,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:37:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-06-05 21:37:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-06-05 21:37:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-06-05 21:37:41,064 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-06-05 21:37:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:41,064 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-06-05 21:37:41,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-06-05 21:37:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:41,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:41,070 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:41,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,270 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-06-05 21:37:41,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:41,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499337703] [2021-06-05 21:37:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:41,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499337703] [2021-06-05 21:37:41,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499337703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531096217] [2021-06-05 21:37:41,341 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:41,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531096217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:41,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:41,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:41,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713736902] [2021-06-05 21:37:41,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:41,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:41,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:41,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:41,408 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:41,762 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-06-05 21:37:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:37:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:41,792 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 21:37:41,792 INFO L226 Difference]: Without dead ends: 18422 [2021-06-05 21:37:41,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:37:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-06-05 21:37:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-06-05 21:37:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-06-05 21:37:42,073 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-06-05 21:37:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:42,073 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-06-05 21:37:42,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-06-05 21:37:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:42,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:42,078 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:42,279 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-06-05 21:37:42,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:42,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832341446] [2021-06-05 21:37:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:42,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:42,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832341446] [2021-06-05 21:37:42,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832341446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387829584] [2021-06-05 21:37:42,336 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:42,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:42,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387829584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:42,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:42,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007227532] [2021-06-05 21:37:42,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:42,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:42,397 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:42,529 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-06-05 21:37:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:37:42,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:42,557 INFO L225 Difference]: With dead ends: 17724 [2021-06-05 21:37:42,557 INFO L226 Difference]: Without dead ends: 17724 [2021-06-05 21:37:42,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-05 21:37:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-06-05 21:37:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-06-05 21:37:42,841 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-06-05 21:37:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:42,841 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-06-05 21:37:42,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-06-05 21:37:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:42,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:42,847 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:43,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,047 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-06-05 21:37:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:43,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658267121] [2021-06-05 21:37:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:43,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658267121] [2021-06-05 21:37:43,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658267121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167827451] [2021-06-05 21:37:43,103 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:43,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167827451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:43,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245479265] [2021-06-05 21:37:43,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:43,159 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:43,355 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-06-05 21:37:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:43,385 INFO L225 Difference]: With dead ends: 17701 [2021-06-05 21:37:43,385 INFO L226 Difference]: Without dead ends: 17697 [2021-06-05 21:37:43,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-06-05 21:37:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-06-05 21:37:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-06-05 21:37:43,664 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-06-05 21:37:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:43,665 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-06-05 21:37:43,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-06-05 21:37:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:43,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:43,670 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:43,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-06-05 21:37:43,881 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-06-05 21:37:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068731069] [2021-06-05 21:37:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:43,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:43,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068731069] [2021-06-05 21:37:43,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068731069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445154234] [2021-06-05 21:37:43,944 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:43,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:43,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:43,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:43,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445154234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:43,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:43,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:43,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127975865] [2021-06-05 21:37:43,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:43,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:43,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:43,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:43,999 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:44,195 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-06-05 21:37:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:37:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:44,223 INFO L225 Difference]: With dead ends: 17251 [2021-06-05 21:37:44,223 INFO L226 Difference]: Without dead ends: 17250 [2021-06-05 21:37:44,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-05 21:37:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-06-05 21:37:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-06-05 21:37:44,493 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-06-05 21:37:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-06-05 21:37:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-06-05 21:37:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:44,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:44,499 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:44,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-06-05 21:37:44,699 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-06-05 21:37:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:44,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932236980] [2021-06-05 21:37:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932236980] [2021-06-05 21:37:44,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932236980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777661521] [2021-06-05 21:37:44,754 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:44,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:44,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:44,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:44,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777661521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:44,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:44,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:37:44,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905891382] [2021-06-05 21:37:44,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:37:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:37:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:37:44,816 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:44,945 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-06-05 21:37:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:44,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:44,978 INFO L225 Difference]: With dead ends: 17351 [2021-06-05 21:37:44,978 INFO L226 Difference]: Without dead ends: 17351 [2021-06-05 21:37:44,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:37:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-06-05 21:37:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-06-05 21:37:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-06-05 21:37:45,262 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-06-05 21:37:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:45,262 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-06-05 21:37:45,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-06-05 21:37:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:45,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:45,268 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:45,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:45,468 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-06-05 21:37:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:45,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354309656] [2021-06-05 21:37:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:45,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354309656] [2021-06-05 21:37:45,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354309656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713007674] [2021-06-05 21:37:45,528 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:45,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:37:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:45,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713007674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:45,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:45,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:45,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625697331] [2021-06-05 21:37:45,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:45,590 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:45,811 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-06-05 21:37:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:45,839 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 21:37:45,839 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 21:37:45,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:37:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 21:37:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-06-05 21:37:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-06-05 21:37:46,113 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-06-05 21:37:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:46,114 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-06-05 21:37:46,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-06-05 21:37:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:46,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:46,119 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-06-05 21:37:46,320 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-06-05 21:37:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533162334] [2021-06-05 21:37:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:46,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533162334] [2021-06-05 21:37:46,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533162334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534089037] [2021-06-05 21:37:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:46,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534089037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:46,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:46,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:46,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894369560] [2021-06-05 21:37:46,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:46,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:46,441 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:46,573 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-06-05 21:37:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:37:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:46,600 INFO L225 Difference]: With dead ends: 17397 [2021-06-05 21:37:46,600 INFO L226 Difference]: Without dead ends: 17397 [2021-06-05 21:37:46,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:37:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-06-05 21:37:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-06-05 21:37:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-06-05 21:37:46,873 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-06-05 21:37:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:46,873 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-06-05 21:37:46,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-06-05 21:37:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:46,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:46,879 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:47,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-06-05 21:37:47,079 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-06-05 21:37:47,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:47,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276033599] [2021-06-05 21:37:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:47,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:47,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276033599] [2021-06-05 21:37:47,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276033599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591402147] [2021-06-05 21:37:47,141 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:47,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591402147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962448373] [2021-06-05 21:37:47,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:47,202 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:47,389 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-06-05 21:37:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:47,422 INFO L225 Difference]: With dead ends: 19691 [2021-06-05 21:37:47,422 INFO L226 Difference]: Without dead ends: 19688 [2021-06-05 21:37:47,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-06-05 21:37:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-06-05 21:37:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-06-05 21:37:47,713 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-06-05 21:37:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:47,714 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-06-05 21:37:47,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-06-05 21:37:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:47,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:47,719 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:47,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-05 21:37:47,921 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-06-05 21:37:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981840653] [2021-06-05 21:37:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:47,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981840653] [2021-06-05 21:37:47,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981840653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156396965] [2021-06-05 21:37:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:37:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:37:48,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156396965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:48,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:37:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597058139] [2021-06-05 21:37:48,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:37:48,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:37:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:37:48,047 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:48,198 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-06-05 21:37:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:37:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:48,246 INFO L225 Difference]: With dead ends: 26038 [2021-06-05 21:37:48,246 INFO L226 Difference]: Without dead ends: 26038 [2021-06-05 21:37:48,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:37:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-06-05 21:37:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-06-05 21:37:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-06-05 21:37:48,692 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-06-05 21:37:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:48,692 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-06-05 21:37:48,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-06-05 21:37:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:48,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:48,698 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:48,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-06-05 21:37:48,899 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-06-05 21:37:48,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:48,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317710072] [2021-06-05 21:37:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:48,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:48,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317710072] [2021-06-05 21:37:48,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317710072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:48,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810310564] [2021-06-05 21:37:48,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:48,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:48,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:49,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810310564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:49,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:49,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:49,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111759663] [2021-06-05 21:37:49,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:49,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:49,031 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:49,276 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-06-05 21:37:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:37:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:49,341 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 21:37:49,341 INFO L226 Difference]: Without dead ends: 28511 [2021-06-05 21:37:49,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-06-05 21:37:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-06-05 21:37:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-06-05 21:37:49,814 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-06-05 21:37:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:49,814 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-06-05 21:37:49,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-06-05 21:37:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:49,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:49,820 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:50,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-06-05 21:37:50,021 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-06-05 21:37:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:50,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98582197] [2021-06-05 21:37:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:50,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98582197] [2021-06-05 21:37:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98582197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591218600] [2021-06-05 21:37:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:50,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:37:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:50,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591218600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:50,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:50,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475781668] [2021-06-05 21:37:50,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:50,153 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:50,368 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-06-05 21:37:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:50,419 INFO L225 Difference]: With dead ends: 26560 [2021-06-05 21:37:50,420 INFO L226 Difference]: Without dead ends: 26560 [2021-06-05 21:37:50,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:37:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-06-05 21:37:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-06-05 21:37:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-06-05 21:37:50,889 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-06-05 21:37:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:50,889 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-06-05 21:37:50,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-06-05 21:37:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:50,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:50,895 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:51,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:51,095 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-06-05 21:37:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:51,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693369088] [2021-06-05 21:37:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:51,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:51,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693369088] [2021-06-05 21:37:51,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693369088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:51,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903674914] [2021-06-05 21:37:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:51,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:37:51,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:51,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903674914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:51,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:51,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:51,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479082650] [2021-06-05 21:37:51,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:51,227 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:51,466 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-06-05 21:37:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:37:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:51,513 INFO L225 Difference]: With dead ends: 26225 [2021-06-05 21:37:51,513 INFO L226 Difference]: Without dead ends: 26220 [2021-06-05 21:37:51,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-05 21:37:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-06-05 21:37:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-06-05 21:37:51,935 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-06-05 21:37:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-06-05 21:37:51,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-06-05 21:37:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:51,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:51,941 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,142 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-06-05 21:37:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:52,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535290440] [2021-06-05 21:37:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535290440] [2021-06-05 21:37:52,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535290440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100983537] [2021-06-05 21:37:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:52,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100983537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:52,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:52,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:52,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341399197] [2021-06-05 21:37:52,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:52,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:52,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:52,274 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:52,474 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-06-05 21:37:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:37:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:52,528 INFO L225 Difference]: With dead ends: 28702 [2021-06-05 21:37:52,528 INFO L226 Difference]: Without dead ends: 28702 [2021-06-05 21:37:52,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:37:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-06-05 21:37:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-06-05 21:37:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-06-05 21:37:53,009 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-06-05 21:37:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:53,009 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-06-05 21:37:53,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-06-05 21:37:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:53,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:53,016 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:53,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-06-05 21:37:53,216 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-06-05 21:37:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:53,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498537646] [2021-06-05 21:37:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498537646] [2021-06-05 21:37:53,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498537646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786518260] [2021-06-05 21:37:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:53,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786518260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:53,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:53,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919882325] [2021-06-05 21:37:53,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:53,348 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:53,564 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-06-05 21:37:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:53,615 INFO L225 Difference]: With dead ends: 28805 [2021-06-05 21:37:53,615 INFO L226 Difference]: Without dead ends: 28799 [2021-06-05 21:37:53,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-06-05 21:37:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-06-05 21:37:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-06-05 21:37:54,090 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-06-05 21:37:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:54,090 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-06-05 21:37:54,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-06-05 21:37:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:54,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:54,096 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:54,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-06-05 21:37:54,297 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-06-05 21:37:54,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:54,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732857677] [2021-06-05 21:37:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732857677] [2021-06-05 21:37:54,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732857677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500863577] [2021-06-05 21:37:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:54,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:54,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500863577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:54,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:54,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988123046] [2021-06-05 21:37:54,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:54,440 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:54,712 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-06-05 21:37:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:37:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:54,766 INFO L225 Difference]: With dead ends: 29601 [2021-06-05 21:37:54,766 INFO L226 Difference]: Without dead ends: 29601 [2021-06-05 21:37:54,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:37:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-05 21:37:55,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-06-05 21:37:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-06-05 21:37:55,342 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-06-05 21:37:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:55,342 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-06-05 21:37:55,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-06-05 21:37:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:55,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:55,350 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:55,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-06-05 21:37:55,551 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-06-05 21:37:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:55,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268329397] [2021-06-05 21:37:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:55,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268329397] [2021-06-05 21:37:55,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268329397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573448855] [2021-06-05 21:37:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:37:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573448855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:55,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:55,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651688248] [2021-06-05 21:37:55,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:55,694 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:55,927 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-06-05 21:37:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:37:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:55,986 INFO L225 Difference]: With dead ends: 29739 [2021-06-05 21:37:55,986 INFO L226 Difference]: Without dead ends: 29732 [2021-06-05 21:37:55,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-06-05 21:37:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-06-05 21:37:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-06-05 21:37:56,485 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-06-05 21:37:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:56,485 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-06-05 21:37:56,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-06-05 21:37:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:56,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:56,493 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:56,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-06-05 21:37:56,701 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-06-05 21:37:56,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:56,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622462155] [2021-06-05 21:37:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622462155] [2021-06-05 21:37:56,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622462155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964983772] [2021-06-05 21:37:56,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:56,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:37:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964983772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:56,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:56,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620347992] [2021-06-05 21:37:56,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:56,839 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:57,201 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-06-05 21:37:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:37:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:57,259 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 21:37:57,259 INFO L226 Difference]: Without dead ends: 29939 [2021-06-05 21:37:57,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:37:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-06-05 21:37:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-06-05 21:37:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-06-05 21:37:57,761 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-06-05 21:37:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:57,761 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-06-05 21:37:57,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-06-05 21:37:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:57,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:57,769 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:57,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:57,969 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-06-05 21:37:57,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:57,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944481459] [2021-06-05 21:37:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944481459] [2021-06-05 21:37:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944481459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424552957] [2021-06-05 21:37:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:58,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:37:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424552957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:58,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:58,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034718752] [2021-06-05 21:37:58,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:58,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:58,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:58,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:58,121 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:58,352 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-06-05 21:37:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:37:58,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:58,413 INFO L225 Difference]: With dead ends: 29973 [2021-06-05 21:37:58,413 INFO L226 Difference]: Without dead ends: 29965 [2021-06-05 21:37:58,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:37:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-06-05 21:37:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-06-05 21:37:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-06-05 21:37:58,942 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-06-05 21:37:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:58,942 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-06-05 21:37:58,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-06-05 21:37:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:37:58,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:58,950 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:59,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-06-05 21:37:59,150 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-06-05 21:37:59,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:59,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084647067] [2021-06-05 21:37:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084647067] [2021-06-05 21:37:59,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084647067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182566205] [2021-06-05 21:37:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:37:59,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182566205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:59,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:59,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:37:59,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386009065] [2021-06-05 21:37:59,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:37:59,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:37:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:37:59,295 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:59,747 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-06-05 21:37:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:37:59,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:37:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:59,807 INFO L225 Difference]: With dead ends: 30267 [2021-06-05 21:37:59,807 INFO L226 Difference]: Without dead ends: 30267 [2021-06-05 21:37:59,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:37:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-06-05 21:38:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-06-05 21:38:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-06-05 21:38:00,325 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-06-05 21:38:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:00,325 INFO L482 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-06-05 21:38:00,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-06-05 21:38:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:00,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:00,333 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:00,533 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-06-05 21:38:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161894519] [2021-06-05 21:38:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:00,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161894519] [2021-06-05 21:38:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161894519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688358923] [2021-06-05 21:38:00,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:00,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:38:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688358923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:00,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:38:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322053579] [2021-06-05 21:38:00,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:38:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:38:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:38:00,654 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:00,853 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-06-05 21:38:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:38:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:00,907 INFO L225 Difference]: With dead ends: 30158 [2021-06-05 21:38:00,907 INFO L226 Difference]: Without dead ends: 30158 [2021-06-05 21:38:00,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:38:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-06-05 21:38:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-06-05 21:38:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-06-05 21:38:01,405 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-06-05 21:38:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:01,405 INFO L482 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-06-05 21:38:01,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-06-05 21:38:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:01,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:01,413 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:01,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21578 [2021-06-05 21:38:01,614 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:01,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-06-05 21:38:01,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:01,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626402115] [2021-06-05 21:38:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:01,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626402115] [2021-06-05 21:38:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626402115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635948723] [2021-06-05 21:38:01,664 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:38:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:38:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635948723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:01,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:01,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:38:01,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45409076] [2021-06-05 21:38:01,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:38:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:38:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:38:01,722 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:02,003 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-06-05 21:38:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:38:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:02,060 INFO L225 Difference]: With dead ends: 31233 [2021-06-05 21:38:02,060 INFO L226 Difference]: Without dead ends: 31229 [2021-06-05 21:38:02,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-06-05 21:38:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-06-05 21:38:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-06-05 21:38:02,573 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-06-05 21:38:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:02,573 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-06-05 21:38:02,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-06-05 21:38:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:02,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:02,580 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:02,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:02,781 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-06-05 21:38:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:02,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370013446] [2021-06-05 21:38:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:02,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:02,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370013446] [2021-06-05 21:38:02,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370013446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:02,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043806722] [2021-06-05 21:38:02,842 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:02,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:02,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043806722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:02,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:02,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:02,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102786939] [2021-06-05 21:38:02,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:02,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:02,898 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:03,126 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-06-05 21:38:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:38:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:03,178 INFO L225 Difference]: With dead ends: 28956 [2021-06-05 21:38:03,178 INFO L226 Difference]: Without dead ends: 28951 [2021-06-05 21:38:03,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-05 21:38:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-06-05 21:38:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-06-05 21:38:03,679 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-06-05 21:38:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:03,679 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-06-05 21:38:03,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-06-05 21:38:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:03,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:03,687 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:03,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21580 [2021-06-05 21:38:03,901 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-06-05 21:38:03,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:03,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154369996] [2021-06-05 21:38:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:03,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:03,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154369996] [2021-06-05 21:38:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154369996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:03,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136168569] [2021-06-05 21:38:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:03,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:04,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136168569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:04,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:04,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:04,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125033524] [2021-06-05 21:38:04,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:04,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:04,025 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:04,313 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-06-05 21:38:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:38:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:04,381 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 21:38:04,382 INFO L226 Difference]: Without dead ends: 34766 [2021-06-05 21:38:04,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-06-05 21:38:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-06-05 21:38:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-06-05 21:38:04,957 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-06-05 21:38:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:04,957 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-06-05 21:38:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-06-05 21:38:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:04,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:04,966 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:05,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21581 [2021-06-05 21:38:05,166 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-06-05 21:38:05,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:05,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083190769] [2021-06-05 21:38:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:05,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:05,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083190769] [2021-06-05 21:38:05,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083190769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:05,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174828024] [2021-06-05 21:38:05,231 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:05,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:38:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:05,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174828024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:05,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:05,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:05,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842407379] [2021-06-05 21:38:05,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:05,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:05,295 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:05,570 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-06-05 21:38:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:38:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:05,639 INFO L225 Difference]: With dead ends: 33998 [2021-06-05 21:38:05,639 INFO L226 Difference]: Without dead ends: 33993 [2021-06-05 21:38:05,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-06-05 21:38:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-06-05 21:38:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-06-05 21:38:06,230 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-06-05 21:38:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-06-05 21:38:06,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-06-05 21:38:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:06,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:06,239 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:06,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21582,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:06,439 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-06-05 21:38:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:06,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558571897] [2021-06-05 21:38:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:06,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:06,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558571897] [2021-06-05 21:38:06,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558571897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:06,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253185511] [2021-06-05 21:38:06,506 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:06,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253185511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:06,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:06,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925072539] [2021-06-05 21:38:06,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:06,566 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:06,901 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-06-05 21:38:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:38:06,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:06,981 INFO L225 Difference]: With dead ends: 40272 [2021-06-05 21:38:06,981 INFO L226 Difference]: Without dead ends: 40272 [2021-06-05 21:38:06,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:38:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-06-05 21:38:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-06-05 21:38:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-06-05 21:38:07,586 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-06-05 21:38:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:07,586 INFO L482 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-06-05 21:38:07,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-06-05 21:38:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:07,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:07,594 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:07,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21583 [2021-06-05 21:38:07,795 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-06-05 21:38:07,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:07,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065933091] [2021-06-05 21:38:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:07,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:07,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065933091] [2021-06-05 21:38:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065933091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:07,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581948939] [2021-06-05 21:38:07,865 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:07,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:07,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581948939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:07,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:07,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495851288] [2021-06-05 21:38:07,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:07,923 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:08,202 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-06-05 21:38:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:38:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:08,258 INFO L225 Difference]: With dead ends: 30323 [2021-06-05 21:38:08,259 INFO L226 Difference]: Without dead ends: 30317 [2021-06-05 21:38:08,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:38:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-06-05 21:38:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-06-05 21:38:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-06-05 21:38:08,779 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-06-05 21:38:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:08,779 INFO L482 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-06-05 21:38:08,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-06-05 21:38:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:08,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:08,787 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:08,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21584 [2021-06-05 21:38:08,988 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-06-05 21:38:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171124135] [2021-06-05 21:38:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:09,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:09,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171124135] [2021-06-05 21:38:09,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171124135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:09,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286305583] [2021-06-05 21:38:09,057 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:09,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:38:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286305583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:09,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:09,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:09,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101563345] [2021-06-05 21:38:09,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:09,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:09,119 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:09,468 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-06-05 21:38:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:38:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:09,535 INFO L225 Difference]: With dead ends: 34838 [2021-06-05 21:38:09,535 INFO L226 Difference]: Without dead ends: 34838 [2021-06-05 21:38:09,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:38:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-06-05 21:38:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-06-05 21:38:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-06-05 21:38:10,122 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-06-05 21:38:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:10,122 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-06-05 21:38:10,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-06-05 21:38:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:10,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:10,130 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:10,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21585,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:10,331 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-06-05 21:38:10,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:10,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109035477] [2021-06-05 21:38:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:10,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109035477] [2021-06-05 21:38:10,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109035477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619625480] [2021-06-05 21:38:10,401 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:10,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:10,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619625480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:10,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:10,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223947007] [2021-06-05 21:38:10,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:10,464 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:10,748 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-06-05 21:38:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:38:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:10,812 INFO L225 Difference]: With dead ends: 34116 [2021-06-05 21:38:10,812 INFO L226 Difference]: Without dead ends: 34111 [2021-06-05 21:38:10,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-06-05 21:38:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-06-05 21:38:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-06-05 21:38:11,616 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-06-05 21:38:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:11,616 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-06-05 21:38:11,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-06-05 21:38:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:11,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:11,624 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21586 [2021-06-05 21:38:11,825 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-06-05 21:38:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482072518] [2021-06-05 21:38:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:11,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482072518] [2021-06-05 21:38:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482072518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483059315] [2021-06-05 21:38:11,885 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:11,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:11,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:11,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483059315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:11,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:11,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:11,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956881561] [2021-06-05 21:38:11,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:11,953 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:12,230 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-06-05 21:38:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:38:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:12,296 INFO L225 Difference]: With dead ends: 36368 [2021-06-05 21:38:12,296 INFO L226 Difference]: Without dead ends: 36368 [2021-06-05 21:38:12,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:38:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-06-05 21:38:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-06-05 21:38:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-06-05 21:38:12,811 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-06-05 21:38:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:12,812 INFO L482 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-06-05 21:38:12,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-06-05 21:38:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:12,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:12,819 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21587 [2021-06-05 21:38:13,020 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-06-05 21:38:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216125098] [2021-06-05 21:38:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:13,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216125098] [2021-06-05 21:38:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216125098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136366117] [2021-06-05 21:38:13,087 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:13,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:38:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:13,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136366117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:13,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:13,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:13,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029698455] [2021-06-05 21:38:13,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:13,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:13,151 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:13,547 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-06-05 21:38:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:38:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:13,592 INFO L225 Difference]: With dead ends: 27914 [2021-06-05 21:38:13,592 INFO L226 Difference]: Without dead ends: 27908 [2021-06-05 21:38:13,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:38:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-06-05 21:38:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-06-05 21:38:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-06-05 21:38:14,035 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-06-05 21:38:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:14,036 INFO L482 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-06-05 21:38:14,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-06-05 21:38:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:14,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:14,044 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:14,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21588 [2021-06-05 21:38:14,244 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-06-05 21:38:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:14,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369928901] [2021-06-05 21:38:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:14,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:14,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369928901] [2021-06-05 21:38:14,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369928901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:14,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347554276] [2021-06-05 21:38:14,310 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:14,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:14,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347554276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:14,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:14,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:14,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295320131] [2021-06-05 21:38:14,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:14,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:14,377 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:14,694 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-06-05 21:38:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:38:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:14,755 INFO L225 Difference]: With dead ends: 32148 [2021-06-05 21:38:14,755 INFO L226 Difference]: Without dead ends: 32148 [2021-06-05 21:38:14,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:38:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-06-05 21:38:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-06-05 21:38:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-06-05 21:38:15,230 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-06-05 21:38:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:15,230 INFO L482 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-06-05 21:38:15,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-06-05 21:38:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:15,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:15,238 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:15,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21589 [2021-06-05 21:38:15,438 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-06-05 21:38:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:15,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748414363] [2021-06-05 21:38:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:15,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748414363] [2021-06-05 21:38:15,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748414363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692974613] [2021-06-05 21:38:15,509 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:15,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:15,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692974613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:15,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:15,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:15,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009008708] [2021-06-05 21:38:15,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:15,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:15,573 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:15,859 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-06-05 21:38:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:38:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:15,905 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 21:38:15,905 INFO L226 Difference]: Without dead ends: 25867 [2021-06-05 21:38:15,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:38:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-06-05 21:38:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-06-05 21:38:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-06-05 21:38:16,336 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-06-05 21:38:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:16,336 INFO L482 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-06-05 21:38:16,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-06-05 21:38:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:16,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:16,344 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:16,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21590 [2021-06-05 21:38:16,545 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-06-05 21:38:16,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:16,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726510477] [2021-06-05 21:38:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:16,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726510477] [2021-06-05 21:38:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726510477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823846977] [2021-06-05 21:38:16,612 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:16,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:38:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:16,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823846977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:16,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:16,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:16,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317725452] [2021-06-05 21:38:16,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:16,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:16,681 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:17,073 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-06-05 21:38:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:38:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:17,122 INFO L225 Difference]: With dead ends: 27927 [2021-06-05 21:38:17,122 INFO L226 Difference]: Without dead ends: 27927 [2021-06-05 21:38:17,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:38:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-06-05 21:38:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-06-05 21:38:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-06-05 21:38:17,560 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-06-05 21:38:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:17,561 INFO L482 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-06-05 21:38:17,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-06-05 21:38:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:17,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:17,568 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:17,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21591,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:17,769 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-06-05 21:38:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:17,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511405865] [2021-06-05 21:38:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:17,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:17,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511405865] [2021-06-05 21:38:17,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511405865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:17,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772016615] [2021-06-05 21:38:17,835 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:17,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:17,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772016615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:17,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:17,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:17,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47038843] [2021-06-05 21:38:17,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:17,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:17,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:17,925 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:18,181 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-06-05 21:38:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:38:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:18,236 INFO L225 Difference]: With dead ends: 27147 [2021-06-05 21:38:18,237 INFO L226 Difference]: Without dead ends: 27142 [2021-06-05 21:38:18,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-06-05 21:38:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-06-05 21:38:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-06-05 21:38:18,697 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-06-05 21:38:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:18,697 INFO L482 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-06-05 21:38:18,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-06-05 21:38:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:18,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:18,705 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:18,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21592,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:18,906 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:18,906 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-06-05 21:38:18,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:18,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108565444] [2021-06-05 21:38:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:18,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108565444] [2021-06-05 21:38:18,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108565444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313718892] [2021-06-05 21:38:18,968 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:18,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:19,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313718892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:19,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:19,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:19,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863194950] [2021-06-05 21:38:19,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:19,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:19,036 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:19,265 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-06-05 21:38:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:38:19,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:19,315 INFO L225 Difference]: With dead ends: 27451 [2021-06-05 21:38:19,315 INFO L226 Difference]: Without dead ends: 27451 [2021-06-05 21:38:19,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:38:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-06-05 21:38:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-06-05 21:38:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-06-05 21:38:19,737 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-06-05 21:38:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:19,737 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-06-05 21:38:19,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-06-05 21:38:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:19,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:19,745 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:19,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21593,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:19,945 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-06-05 21:38:19,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:19,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999351508] [2021-06-05 21:38:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:20,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:20,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999351508] [2021-06-05 21:38:20,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999351508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:20,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018644758] [2021-06-05 21:38:20,017 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:20,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:38:20,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018644758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:20,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:20,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:20,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38381575] [2021-06-05 21:38:20,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:20,081 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:20,290 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-06-05 21:38:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:38:20,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:20,337 INFO L225 Difference]: With dead ends: 25024 [2021-06-05 21:38:20,337 INFO L226 Difference]: Without dead ends: 25018 [2021-06-05 21:38:20,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-06-05 21:38:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-06-05 21:38:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-06-05 21:38:20,728 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-06-05 21:38:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:20,728 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-06-05 21:38:20,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-06-05 21:38:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:20,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:20,735 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:20,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21594 [2021-06-05 21:38:20,936 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-06-05 21:38:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:20,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309498746] [2021-06-05 21:38:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:20,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:21,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309498746] [2021-06-05 21:38:21,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309498746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:21,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617795142] [2021-06-05 21:38:21,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617795142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:21,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:21,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:21,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151004126] [2021-06-05 21:38:21,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:21,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:21,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:21,067 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:21,291 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-06-05 21:38:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:38:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:21,337 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 21:38:21,337 INFO L226 Difference]: Without dead ends: 25874 [2021-06-05 21:38:21,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-06-05 21:38:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-06-05 21:38:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-06-05 21:38:21,759 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-06-05 21:38:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:21,760 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-06-05 21:38:21,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-06-05 21:38:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:21,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:21,767 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:21,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21595 [2021-06-05 21:38:21,968 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:21,968 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-06-05 21:38:21,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:21,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48680721] [2021-06-05 21:38:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:22,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48680721] [2021-06-05 21:38:22,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48680721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050071138] [2021-06-05 21:38:22,048 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:22,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:22,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:22,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050071138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:22,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:22,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:22,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348409282] [2021-06-05 21:38:22,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:22,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:22,113 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:22,321 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-06-05 21:38:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:38:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:22,365 INFO L225 Difference]: With dead ends: 25438 [2021-06-05 21:38:22,365 INFO L226 Difference]: Without dead ends: 25431 [2021-06-05 21:38:22,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-06-05 21:38:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-06-05 21:38:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-06-05 21:38:22,767 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-06-05 21:38:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:22,768 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-06-05 21:38:22,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-06-05 21:38:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:22,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:22,775 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21596 [2021-06-05 21:38:22,975 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-06-05 21:38:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012238742] [2021-06-05 21:38:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012238742] [2021-06-05 21:38:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012238742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686813249] [2021-06-05 21:38:23,044 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:23,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:38:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686813249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:23,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:23,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:23,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984036626] [2021-06-05 21:38:23,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:23,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:23,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:23,113 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:23,450 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-06-05 21:38:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:38:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:23,493 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 21:38:23,493 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 21:38:23,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:38:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 21:38:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-06-05 21:38:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-06-05 21:38:23,912 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-06-05 21:38:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:23,912 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-06-05 21:38:23,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-06-05 21:38:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:23,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:23,920 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:24,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21597 [2021-06-05 21:38:24,120 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-06-05 21:38:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:24,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972953589] [2021-06-05 21:38:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:24,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:24,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972953589] [2021-06-05 21:38:24,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972953589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:24,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627555743] [2021-06-05 21:38:24,199 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:24,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:24,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627555743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:24,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:24,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746061743] [2021-06-05 21:38:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:24,264 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:24,485 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-06-05 21:38:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:38:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:24,530 INFO L225 Difference]: With dead ends: 25442 [2021-06-05 21:38:24,530 INFO L226 Difference]: Without dead ends: 25434 [2021-06-05 21:38:24,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-06-05 21:38:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-06-05 21:38:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-06-05 21:38:24,936 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-06-05 21:38:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:24,936 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-06-05 21:38:24,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-06-05 21:38:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:24,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:24,943 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:25,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21598 [2021-06-05 21:38:25,144 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-06-05 21:38:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:25,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123349949] [2021-06-05 21:38:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:25,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:25,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123349949] [2021-06-05 21:38:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123349949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:25,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706625834] [2021-06-05 21:38:25,217 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:25,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:25,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706625834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:25,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576406778] [2021-06-05 21:38:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:25,288 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:25,711 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-06-05 21:38:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:38:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:25,757 INFO L225 Difference]: With dead ends: 25692 [2021-06-05 21:38:25,758 INFO L226 Difference]: Without dead ends: 25692 [2021-06-05 21:38:25,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:38:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-06-05 21:38:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-06-05 21:38:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-06-05 21:38:26,164 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-06-05 21:38:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:26,164 INFO L482 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-06-05 21:38:26,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-06-05 21:38:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:26,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:26,171 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:26,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21599 [2021-06-05 21:38:26,373 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-06-05 21:38:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305001106] [2021-06-05 21:38:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:26,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305001106] [2021-06-05 21:38:26,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305001106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150728891] [2021-06-05 21:38:26,435 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:26,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:38:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150728891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463931922] [2021-06-05 21:38:26,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:26,498 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:26,648 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-06-05 21:38:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:38:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:26,693 INFO L225 Difference]: With dead ends: 25353 [2021-06-05 21:38:26,693 INFO L226 Difference]: Without dead ends: 25353 [2021-06-05 21:38:26,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-06-05 21:38:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-06-05 21:38:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-06-05 21:38:27,132 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-06-05 21:38:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:27,132 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-06-05 21:38:27,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-06-05 21:38:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:27,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:27,139 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:27,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21600,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:27,340 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-06-05 21:38:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414506121] [2021-06-05 21:38:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:27,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:27,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414506121] [2021-06-05 21:38:27,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414506121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:27,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381786825] [2021-06-05 21:38:27,406 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:27,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381786825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:27,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:27,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022299677] [2021-06-05 21:38:27,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:27,462 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:27,699 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-06-05 21:38:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:38:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:27,743 INFO L225 Difference]: With dead ends: 25371 [2021-06-05 21:38:27,743 INFO L226 Difference]: Without dead ends: 25367 [2021-06-05 21:38:27,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-06-05 21:38:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-06-05 21:38:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-06-05 21:38:28,159 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-06-05 21:38:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:28,159 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-06-05 21:38:28,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-06-05 21:38:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:28,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:28,166 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:28,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21601 [2021-06-05 21:38:28,367 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-06-05 21:38:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:28,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182745954] [2021-06-05 21:38:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:28,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:28,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182745954] [2021-06-05 21:38:28,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182745954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:28,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419407718] [2021-06-05 21:38:28,435 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:28,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:28,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419407718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:28,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:28,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939420009] [2021-06-05 21:38:28,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:28,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:28,493 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:28,735 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-06-05 21:38:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:38:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:28,785 INFO L225 Difference]: With dead ends: 25448 [2021-06-05 21:38:28,785 INFO L226 Difference]: Without dead ends: 25447 [2021-06-05 21:38:28,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-06-05 21:38:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-06-05 21:38:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-06-05 21:38:29,235 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-06-05 21:38:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:29,236 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-06-05 21:38:29,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-06-05 21:38:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:29,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:29,243 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:29,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:29,444 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-06-05 21:38:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:29,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187121008] [2021-06-05 21:38:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:29,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:29,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187121008] [2021-06-05 21:38:29,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187121008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:29,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775602035] [2021-06-05 21:38:29,500 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:29,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:38:29,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775602035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:29,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509243332] [2021-06-05 21:38:29,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:29,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:29,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:29,564 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:29,726 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-06-05 21:38:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:38:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:29,775 INFO L225 Difference]: With dead ends: 25635 [2021-06-05 21:38:29,775 INFO L226 Difference]: Without dead ends: 25635 [2021-06-05 21:38:29,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:38:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-06-05 21:38:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-06-05 21:38:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-06-05 21:38:30,223 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-06-05 21:38:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:30,223 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-06-05 21:38:30,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-06-05 21:38:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:30,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:30,231 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:30,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21603,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:30,431 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:30,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-06-05 21:38:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:30,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620042659] [2021-06-05 21:38:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:30,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:30,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620042659] [2021-06-05 21:38:30,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620042659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:30,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527710201] [2021-06-05 21:38:30,491 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:30,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:30,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:30,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527710201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:30,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:30,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:30,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32533647] [2021-06-05 21:38:30,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:30,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:30,554 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:30,874 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-06-05 21:38:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:38:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:30,917 INFO L225 Difference]: With dead ends: 25479 [2021-06-05 21:38:30,918 INFO L226 Difference]: Without dead ends: 25477 [2021-06-05 21:38:30,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-06-05 21:38:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-06-05 21:38:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-06-05 21:38:31,332 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-06-05 21:38:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:31,332 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-06-05 21:38:31,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-06-05 21:38:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:31,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:31,339 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:31,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21604,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:31,540 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-06-05 21:38:31,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:31,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101454964] [2021-06-05 21:38:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:31,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101454964] [2021-06-05 21:38:31,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101454964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965620145] [2021-06-05 21:38:31,594 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:31,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:38:31,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965620145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:31,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:31,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154125358] [2021-06-05 21:38:31,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:31,661 INFO L87 Difference]: Start difference. First operand 25162 states and 86138 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:31,834 INFO L93 Difference]: Finished difference Result 25812 states and 87617 transitions. [2021-06-05 21:38:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:38:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:31,877 INFO L225 Difference]: With dead ends: 25812 [2021-06-05 21:38:31,877 INFO L226 Difference]: Without dead ends: 25812 [2021-06-05 21:38:31,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:38:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-06-05 21:38:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 25201. [2021-06-05 21:38:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 3.4220634920634923) internal successors, (86236), 25200 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 86236 transitions. [2021-06-05 21:38:32,287 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 86236 transitions. Word has length 22 [2021-06-05 21:38:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:32,287 INFO L482 AbstractCegarLoop]: Abstraction has 25201 states and 86236 transitions. [2021-06-05 21:38:32,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 86236 transitions. [2021-06-05 21:38:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:32,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:32,294 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:32,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21605,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:32,495 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash 187302365, now seen corresponding path program 240 times [2021-06-05 21:38:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:32,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142021517] [2021-06-05 21:38:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:32,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:32,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142021517] [2021-06-05 21:38:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142021517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:32,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997825100] [2021-06-05 21:38:32,555 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:32,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:38:32,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:32,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997825100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:32,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:32,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:32,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942595610] [2021-06-05 21:38:32,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:32,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:32,618 INFO L87 Difference]: Start difference. First operand 25201 states and 86236 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:32,848 INFO L93 Difference]: Finished difference Result 30537 states and 103865 transitions. [2021-06-05 21:38:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:38:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:32,903 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 21:38:32,903 INFO L226 Difference]: Without dead ends: 30534 [2021-06-05 21:38:32,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-06-05 21:38:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 25737. [2021-06-05 21:38:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25737 states, 25736 states have (on average 3.426173453528132) internal successors, (88176), 25736 states have internal predecessors, (88176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25737 states to 25737 states and 88176 transitions. [2021-06-05 21:38:33,373 INFO L78 Accepts]: Start accepts. Automaton has 25737 states and 88176 transitions. Word has length 22 [2021-06-05 21:38:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:33,373 INFO L482 AbstractCegarLoop]: Abstraction has 25737 states and 88176 transitions. [2021-06-05 21:38:33,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25737 states and 88176 transitions. [2021-06-05 21:38:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:33,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:33,381 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:33,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21606,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:33,581 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1585237046, now seen corresponding path program 241 times [2021-06-05 21:38:33,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:33,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946838900] [2021-06-05 21:38:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:33,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946838900] [2021-06-05 21:38:33,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946838900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862201311] [2021-06-05 21:38:33,637 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:33,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862201311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:33,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:33,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:33,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162556558] [2021-06-05 21:38:33,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:33,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:33,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:33,702 INFO L87 Difference]: Start difference. First operand 25737 states and 88176 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:33,893 INFO L93 Difference]: Finished difference Result 32821 states and 111446 transitions. [2021-06-05 21:38:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:38:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:33,957 INFO L225 Difference]: With dead ends: 32821 [2021-06-05 21:38:33,958 INFO L226 Difference]: Without dead ends: 32821 [2021-06-05 21:38:33,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:38:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32821 states. [2021-06-05 21:38:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32821 to 31903. [2021-06-05 21:38:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31903 states, 31902 states have (on average 3.4264622907654694) internal successors, (109311), 31902 states have internal predecessors, (109311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31903 states to 31903 states and 109311 transitions. [2021-06-05 21:38:34,490 INFO L78 Accepts]: Start accepts. Automaton has 31903 states and 109311 transitions. Word has length 22 [2021-06-05 21:38:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:34,490 INFO L482 AbstractCegarLoop]: Abstraction has 31903 states and 109311 transitions. [2021-06-05 21:38:34,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:34,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31903 states and 109311 transitions. [2021-06-05 21:38:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:34,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:34,498 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:34,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21607 [2021-06-05 21:38:34,698 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash -885783015, now seen corresponding path program 242 times [2021-06-05 21:38:34,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:34,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031834805] [2021-06-05 21:38:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:34,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031834805] [2021-06-05 21:38:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031834805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120596760] [2021-06-05 21:38:34,762 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:34,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:34,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:34,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120596760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:34,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:34,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:34,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217711690] [2021-06-05 21:38:34,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:34,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:34,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:34,848 INFO L87 Difference]: Start difference. First operand 31903 states and 109311 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:35,090 INFO L93 Difference]: Finished difference Result 35145 states and 119531 transitions. [2021-06-05 21:38:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:38:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:35,155 INFO L225 Difference]: With dead ends: 35145 [2021-06-05 21:38:35,155 INFO L226 Difference]: Without dead ends: 35141 [2021-06-05 21:38:35,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35141 states. [2021-06-05 21:38:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35141 to 31927. [2021-06-05 21:38:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31927 states, 31926 states have (on average 3.426423604585604) internal successors, (109392), 31926 states have internal predecessors, (109392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31927 states to 31927 states and 109392 transitions. [2021-06-05 21:38:35,745 INFO L78 Accepts]: Start accepts. Automaton has 31927 states and 109392 transitions. Word has length 22 [2021-06-05 21:38:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:35,745 INFO L482 AbstractCegarLoop]: Abstraction has 31927 states and 109392 transitions. [2021-06-05 21:38:35,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31927 states and 109392 transitions. [2021-06-05 21:38:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:35,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:35,753 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:35,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21608,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:35,953 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1047381468, now seen corresponding path program 243 times [2021-06-05 21:38:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:35,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698497985] [2021-06-05 21:38:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:36,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698497985] [2021-06-05 21:38:36,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698497985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156020677] [2021-06-05 21:38:36,012 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:36,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:38:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:36,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156020677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:36,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:36,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:38:36,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297373022] [2021-06-05 21:38:36,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:36,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:36,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:36,082 INFO L87 Difference]: Start difference. First operand 31927 states and 109392 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:36,260 INFO L93 Difference]: Finished difference Result 34058 states and 115874 transitions. [2021-06-05 21:38:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:38:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:36,325 INFO L225 Difference]: With dead ends: 34058 [2021-06-05 21:38:36,325 INFO L226 Difference]: Without dead ends: 34058 [2021-06-05 21:38:36,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:38:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34058 states. [2021-06-05 21:38:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34058 to 33786. [2021-06-05 21:38:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33786 states, 33785 states have (on average 3.4163978096788514) internal successors, (115423), 33785 states have internal predecessors, (115423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 115423 transitions. [2021-06-05 21:38:36,890 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 115423 transitions. Word has length 22 [2021-06-05 21:38:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:36,891 INFO L482 AbstractCegarLoop]: Abstraction has 33786 states and 115423 transitions. [2021-06-05 21:38:36,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 115423 transitions. [2021-06-05 21:38:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:36,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:36,899 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:37,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21609 [2021-06-05 21:38:37,113 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash 208308573, now seen corresponding path program 244 times [2021-06-05 21:38:37,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:37,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725150169] [2021-06-05 21:38:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:37,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:37,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725150169] [2021-06-05 21:38:37,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725150169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:37,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138724979] [2021-06-05 21:38:37,185 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:37,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138724979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:37,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:37,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653140388] [2021-06-05 21:38:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:37,248 INFO L87 Difference]: Start difference. First operand 33786 states and 115423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:37,520 INFO L93 Difference]: Finished difference Result 36935 states and 125285 transitions. [2021-06-05 21:38:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:38:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:37,594 INFO L225 Difference]: With dead ends: 36935 [2021-06-05 21:38:37,594 INFO L226 Difference]: Without dead ends: 36930 [2021-06-05 21:38:37,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36930 states. [2021-06-05 21:38:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36930 to 34131. [2021-06-05 21:38:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34131 states, 34130 states have (on average 3.4184295341341926) internal successors, (116671), 34130 states have internal predecessors, (116671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34131 states to 34131 states and 116671 transitions. [2021-06-05 21:38:38,204 INFO L78 Accepts]: Start accepts. Automaton has 34131 states and 116671 transitions. Word has length 22 [2021-06-05 21:38:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:38,204 INFO L482 AbstractCegarLoop]: Abstraction has 34131 states and 116671 transitions. [2021-06-05 21:38:38,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 34131 states and 116671 transitions. [2021-06-05 21:38:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:38,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:38,212 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:38,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21610,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:38,412 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1553727734, now seen corresponding path program 245 times [2021-06-05 21:38:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:38,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706623269] [2021-06-05 21:38:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:38,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706623269] [2021-06-05 21:38:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706623269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733665645] [2021-06-05 21:38:38,491 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:38,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:38,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733665645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:38,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:38,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:38,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876392455] [2021-06-05 21:38:38,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:38,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:38,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:38,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:38,559 INFO L87 Difference]: Start difference. First operand 34131 states and 116671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:38,786 INFO L93 Difference]: Finished difference Result 34565 states and 117528 transitions. [2021-06-05 21:38:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:38:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:38,848 INFO L225 Difference]: With dead ends: 34565 [2021-06-05 21:38:38,848 INFO L226 Difference]: Without dead ends: 34565 [2021-06-05 21:38:38,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34565 states. [2021-06-05 21:38:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34565 to 34136. [2021-06-05 21:38:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178995166251647) internal successors, (116670), 34135 states have internal predecessors, (116670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116670 transitions. [2021-06-05 21:38:39,402 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116670 transitions. Word has length 22 [2021-06-05 21:38:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:39,402 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116670 transitions. [2021-06-05 21:38:39,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116670 transitions. [2021-06-05 21:38:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:39,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:39,411 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21611 [2021-06-05 21:38:39,611 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -234590567, now seen corresponding path program 246 times [2021-06-05 21:38:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:39,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203677544] [2021-06-05 21:38:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:39,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:39,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203677544] [2021-06-05 21:38:39,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203677544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758698724] [2021-06-05 21:38:39,687 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:39,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:38:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:39,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:39,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758698724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:39,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:39,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:39,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388092458] [2021-06-05 21:38:39,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:39,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:39,770 INFO L87 Difference]: Start difference. First operand 34136 states and 116670 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:40,017 INFO L93 Difference]: Finished difference Result 34685 states and 118130 transitions. [2021-06-05 21:38:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:38:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:40,081 INFO L225 Difference]: With dead ends: 34685 [2021-06-05 21:38:40,081 INFO L226 Difference]: Without dead ends: 34679 [2021-06-05 21:38:40,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-06-05 21:38:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34136. [2021-06-05 21:38:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178702211806065) internal successors, (116669), 34135 states have internal predecessors, (116669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116669 transitions. [2021-06-05 21:38:40,651 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116669 transitions. Word has length 22 [2021-06-05 21:38:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:40,651 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116669 transitions. [2021-06-05 21:38:40,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116669 transitions. [2021-06-05 21:38:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:40,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:40,659 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:40,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21612,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:40,865 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:40,865 INFO L82 PathProgramCache]: Analyzing trace with hash -70592796, now seen corresponding path program 247 times [2021-06-05 21:38:40,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:40,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637454883] [2021-06-05 21:38:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:40,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637454883] [2021-06-05 21:38:40,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637454883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915890495] [2021-06-05 21:38:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915890495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:40,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:40,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461708234] [2021-06-05 21:38:40,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:40,996 INFO L87 Difference]: Start difference. First operand 34136 states and 116669 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:41,231 INFO L93 Difference]: Finished difference Result 34892 states and 118662 transitions. [2021-06-05 21:38:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:38:41,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:41,295 INFO L225 Difference]: With dead ends: 34892 [2021-06-05 21:38:41,295 INFO L226 Difference]: Without dead ends: 34892 [2021-06-05 21:38:41,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:38:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34892 states. [2021-06-05 21:38:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34892 to 34647. [2021-06-05 21:38:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.412861513594643) internal successors, (118242), 34646 states have internal predecessors, (118242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118242 transitions. [2021-06-05 21:38:41,859 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118242 transitions. Word has length 22 [2021-06-05 21:38:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:41,859 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118242 transitions. [2021-06-05 21:38:41,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118242 transitions. [2021-06-05 21:38:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:41,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:41,868 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:42,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21613,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:42,068 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1079562019, now seen corresponding path program 248 times [2021-06-05 21:38:42,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:42,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992025676] [2021-06-05 21:38:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:42,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:42,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992025676] [2021-06-05 21:38:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992025676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:42,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71151567] [2021-06-05 21:38:42,141 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:42,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:42,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71151567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:42,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:42,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598068735] [2021-06-05 21:38:42,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:42,205 INFO L87 Difference]: Start difference. First operand 34647 states and 118242 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:42,445 INFO L93 Difference]: Finished difference Result 35167 states and 119631 transitions. [2021-06-05 21:38:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:38:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:42,510 INFO L225 Difference]: With dead ends: 35167 [2021-06-05 21:38:42,510 INFO L226 Difference]: Without dead ends: 35160 [2021-06-05 21:38:42,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35160 states. [2021-06-05 21:38:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35160 to 34647. [2021-06-05 21:38:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.4128326502337933) internal successors, (118241), 34646 states have internal predecessors, (118241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118241 transitions. [2021-06-05 21:38:43,064 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118241 transitions. Word has length 22 [2021-06-05 21:38:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:43,064 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118241 transitions. [2021-06-05 21:38:43,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118241 transitions. [2021-06-05 21:38:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:43,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:43,072 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:43,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21614,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:43,273 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1338049974, now seen corresponding path program 249 times [2021-06-05 21:38:43,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:43,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475898066] [2021-06-05 21:38:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:43,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:43,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475898066] [2021-06-05 21:38:43,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475898066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:43,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020585519] [2021-06-05 21:38:43,342 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:43,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:38:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:43,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020585519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:43,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:43,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:43,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468309028] [2021-06-05 21:38:43,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:43,422 INFO L87 Difference]: Start difference. First operand 34647 states and 118241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:43,714 INFO L93 Difference]: Finished difference Result 35095 states and 119279 transitions. [2021-06-05 21:38:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:38:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:43,778 INFO L225 Difference]: With dead ends: 35095 [2021-06-05 21:38:43,778 INFO L226 Difference]: Without dead ends: 35095 [2021-06-05 21:38:43,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:38:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-06-05 21:38:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34867. [2021-06-05 21:38:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.410342453966615) internal successors, (118905), 34866 states have internal predecessors, (118905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118905 transitions. [2021-06-05 21:38:44,365 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118905 transitions. Word has length 22 [2021-06-05 21:38:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:44,365 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118905 transitions. [2021-06-05 21:38:44,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118905 transitions. [2021-06-05 21:38:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:44,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:44,374 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21615,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:44,576 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1503873255, now seen corresponding path program 250 times [2021-06-05 21:38:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:44,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455519159] [2021-06-05 21:38:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455519159] [2021-06-05 21:38:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455519159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421347488] [2021-06-05 21:38:44,654 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:44,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:44,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421347488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:44,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:44,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959431283] [2021-06-05 21:38:44,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:44,728 INFO L87 Difference]: Start difference. First operand 34867 states and 118905 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:44,992 INFO L93 Difference]: Finished difference Result 35358 states and 120222 transitions. [2021-06-05 21:38:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:38:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:45,060 INFO L225 Difference]: With dead ends: 35358 [2021-06-05 21:38:45,060 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 21:38:45,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 21:38:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34867. [2021-06-05 21:38:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.41031377272988) internal successors, (118904), 34866 states have internal predecessors, (118904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118904 transitions. [2021-06-05 21:38:45,641 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118904 transitions. Word has length 22 [2021-06-05 21:38:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:45,641 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118904 transitions. [2021-06-05 21:38:45,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118904 transitions. [2021-06-05 21:38:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:45,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:45,649 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:45,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21616,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:45,850 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1974516828, now seen corresponding path program 251 times [2021-06-05 21:38:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:45,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715349995] [2021-06-05 21:38:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:45,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715349995] [2021-06-05 21:38:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715349995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909532427] [2021-06-05 21:38:45,923 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:45,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909532427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:45,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:45,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54967935] [2021-06-05 21:38:45,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:45,990 INFO L87 Difference]: Start difference. First operand 34867 states and 118904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:46,398 INFO L93 Difference]: Finished difference Result 35266 states and 119729 transitions. [2021-06-05 21:38:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:38:46,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:46,464 INFO L225 Difference]: With dead ends: 35266 [2021-06-05 21:38:46,464 INFO L226 Difference]: Without dead ends: 35266 [2021-06-05 21:38:46,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:38:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35266 states. [2021-06-05 21:38:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35266 to 34965. [2021-06-05 21:38:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409163711245853) internal successors, (119198), 34964 states have internal predecessors, (119198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119198 transitions. [2021-06-05 21:38:47,157 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119198 transitions. Word has length 22 [2021-06-05 21:38:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:47,157 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119198 transitions. [2021-06-05 21:38:47,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119198 transitions. [2021-06-05 21:38:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:47,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:47,166 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:47,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21617 [2021-06-05 21:38:47,367 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1772619683, now seen corresponding path program 252 times [2021-06-05 21:38:47,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:47,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495736413] [2021-06-05 21:38:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:47,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:47,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495736413] [2021-06-05 21:38:47,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495736413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:47,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967282275] [2021-06-05 21:38:47,450 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:47,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:38:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:47,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967282275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:47,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:47,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:47,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238346350] [2021-06-05 21:38:47,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:47,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:47,518 INFO L87 Difference]: Start difference. First operand 34965 states and 119198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:47,754 INFO L93 Difference]: Finished difference Result 35421 states and 120437 transitions. [2021-06-05 21:38:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:38:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:47,824 INFO L225 Difference]: With dead ends: 35421 [2021-06-05 21:38:47,824 INFO L226 Difference]: Without dead ends: 35412 [2021-06-05 21:38:47,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35412 states. [2021-06-05 21:38:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35412 to 34965. [2021-06-05 21:38:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409135110399268) internal successors, (119197), 34964 states have internal predecessors, (119197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119197 transitions. [2021-06-05 21:38:48,450 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119197 transitions. Word has length 22 [2021-06-05 21:38:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:48,450 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119197 transitions. [2021-06-05 21:38:48,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119197 transitions. [2021-06-05 21:38:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:48,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:48,459 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:48,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21618,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:48,673 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -230152822, now seen corresponding path program 253 times [2021-06-05 21:38:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:48,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420861955] [2021-06-05 21:38:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:48,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:48,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420861955] [2021-06-05 21:38:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420861955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:48,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436117336] [2021-06-05 21:38:48,752 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:48,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436117336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:48,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:48,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538489025] [2021-06-05 21:38:48,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:48,820 INFO L87 Difference]: Start difference. First operand 34965 states and 119197 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:49,298 INFO L93 Difference]: Finished difference Result 35597 states and 120659 transitions. [2021-06-05 21:38:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:38:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:49,370 INFO L225 Difference]: With dead ends: 35597 [2021-06-05 21:38:49,370 INFO L226 Difference]: Without dead ends: 35597 [2021-06-05 21:38:49,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:38:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35597 states. [2021-06-05 21:38:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35597 to 35052. [2021-06-05 21:38:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35052 states, 35051 states have (on average 3.4081195971584264) internal successors, (119458), 35051 states have internal predecessors, (119458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35052 states to 35052 states and 119458 transitions. [2021-06-05 21:38:49,954 INFO L78 Accepts]: Start accepts. Automaton has 35052 states and 119458 transitions. Word has length 22 [2021-06-05 21:38:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:49,955 INFO L482 AbstractCegarLoop]: Abstraction has 35052 states and 119458 transitions. [2021-06-05 21:38:49,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35052 states and 119458 transitions. [2021-06-05 21:38:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:49,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:49,963 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:50,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21619,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:50,164 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash -599127143, now seen corresponding path program 254 times [2021-06-05 21:38:50,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:50,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485121901] [2021-06-05 21:38:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:50,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485121901] [2021-06-05 21:38:50,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485121901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:50,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844094674] [2021-06-05 21:38:50,233 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:50,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:50,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:50,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844094674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:50,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:50,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:50,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264169912] [2021-06-05 21:38:50,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:50,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:50,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:50,299 INFO L87 Difference]: Start difference. First operand 35052 states and 119458 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:50,526 INFO L93 Difference]: Finished difference Result 35467 states and 120355 transitions. [2021-06-05 21:38:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:38:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:50,598 INFO L225 Difference]: With dead ends: 35467 [2021-06-05 21:38:50,599 INFO L226 Difference]: Without dead ends: 35467 [2021-06-05 21:38:50,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:38:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2021-06-05 21:38:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 35013. [2021-06-05 21:38:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 3.4085742031303554) internal successors, (119341), 35012 states have internal predecessors, (119341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 119341 transitions. [2021-06-05 21:38:51,195 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 119341 transitions. Word has length 22 [2021-06-05 21:38:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:51,195 INFO L482 AbstractCegarLoop]: Abstraction has 35013 states and 119341 transitions. [2021-06-05 21:38:51,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 119341 transitions. [2021-06-05 21:38:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:51,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:51,204 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:51,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21620 [2021-06-05 21:38:51,404 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:51,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1376871388, now seen corresponding path program 255 times [2021-06-05 21:38:51,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:51,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222592458] [2021-06-05 21:38:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222592458] [2021-06-05 21:38:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222592458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606481728] [2021-06-05 21:38:51,461 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:51,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:38:51,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:38:51,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606481728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:51,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:51,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:38:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060739308] [2021-06-05 21:38:51,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:38:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:38:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:38:51,526 INFO L87 Difference]: Start difference. First operand 35013 states and 119341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:51,830 INFO L93 Difference]: Finished difference Result 35354 states and 119908 transitions. [2021-06-05 21:38:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:38:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:51,901 INFO L225 Difference]: With dead ends: 35354 [2021-06-05 21:38:51,901 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 21:38:51,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 21:38:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34236. [2021-06-05 21:38:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406192493062655) internal successors, (116611), 34235 states have internal predecessors, (116611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116611 transitions. [2021-06-05 21:38:52,481 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116611 transitions. Word has length 22 [2021-06-05 21:38:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:52,481 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116611 transitions. [2021-06-05 21:38:52,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116611 transitions. [2021-06-05 21:38:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:52,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:52,490 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:52,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21621 [2021-06-05 21:38:52,692 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:52,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591385, now seen corresponding path program 256 times [2021-06-05 21:38:52,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:52,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041452283] [2021-06-05 21:38:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041452283] [2021-06-05 21:38:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041452283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253135775] [2021-06-05 21:38:52,773 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:52,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253135775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79627140] [2021-06-05 21:38:52,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:52,829 INFO L87 Difference]: Start difference. First operand 34236 states and 116611 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:53,098 INFO L93 Difference]: Finished difference Result 34750 states and 117977 transitions. [2021-06-05 21:38:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:38:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:53,163 INFO L225 Difference]: With dead ends: 34750 [2021-06-05 21:38:53,163 INFO L226 Difference]: Without dead ends: 34744 [2021-06-05 21:38:53,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:38:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34744 states. [2021-06-05 21:38:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34744 to 34236. [2021-06-05 21:38:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406134073316781) internal successors, (116609), 34235 states have internal predecessors, (116609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116609 transitions. [2021-06-05 21:38:53,756 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116609 transitions. Word has length 22 [2021-06-05 21:38:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:53,756 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116609 transitions. [2021-06-05 21:38:53,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116609 transitions. [2021-06-05 21:38:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:53,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:53,765 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:53,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21622 [2021-06-05 21:38:53,965 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:53,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2119589156, now seen corresponding path program 257 times [2021-06-05 21:38:53,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:53,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842847668] [2021-06-05 21:38:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:54,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842847668] [2021-06-05 21:38:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842847668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505972180] [2021-06-05 21:38:54,036 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:54,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:38:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:54,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505972180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:54,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:54,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:38:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328010580] [2021-06-05 21:38:54,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:38:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:38:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:38:54,098 INFO L87 Difference]: Start difference. First operand 34236 states and 116609 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:54,484 INFO L93 Difference]: Finished difference Result 42443 states and 142235 transitions. [2021-06-05 21:38:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:38:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:54,572 INFO L225 Difference]: With dead ends: 42443 [2021-06-05 21:38:54,572 INFO L226 Difference]: Without dead ends: 42443 [2021-06-05 21:38:54,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:38:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42443 states. [2021-06-05 21:38:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42443 to 40328. [2021-06-05 21:38:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386341656954398) internal successors, (136561), 40327 states have internal predecessors, (136561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136561 transitions. [2021-06-05 21:38:55,333 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136561 transitions. Word has length 22 [2021-06-05 21:38:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:55,334 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136561 transitions. [2021-06-05 21:38:55,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136561 transitions. [2021-06-05 21:38:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:55,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:55,343 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:55,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21623 [2021-06-05 21:38:55,544 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1319124531, now seen corresponding path program 258 times [2021-06-05 21:38:55,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:55,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630630495] [2021-06-05 21:38:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:55,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:55,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630630495] [2021-06-05 21:38:55,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630630495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:55,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220740413] [2021-06-05 21:38:55,611 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:55,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:38:55,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:55,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220740413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:55,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:55,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:55,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006454179] [2021-06-05 21:38:55,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:55,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:55,676 INFO L87 Difference]: Start difference. First operand 40328 states and 136561 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:55,975 INFO L93 Difference]: Finished difference Result 40963 states and 138166 transitions. [2021-06-05 21:38:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:38:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:56,058 INFO L225 Difference]: With dead ends: 40963 [2021-06-05 21:38:56,058 INFO L226 Difference]: Without dead ends: 40957 [2021-06-05 21:38:56,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:38:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40957 states. [2021-06-05 21:38:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40957 to 40328. [2021-06-05 21:38:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386292062389962) internal successors, (136559), 40327 states have internal predecessors, (136559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136559 transitions. [2021-06-05 21:38:56,801 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136559 transitions. Word has length 22 [2021-06-05 21:38:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:56,802 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136559 transitions. [2021-06-05 21:38:56,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136559 transitions. [2021-06-05 21:38:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:56,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:56,811 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:57,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21624,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:57,012 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1483122302, now seen corresponding path program 259 times [2021-06-05 21:38:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:57,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345329556] [2021-06-05 21:38:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:57,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345329556] [2021-06-05 21:38:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345329556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503718930] [2021-06-05 21:38:57,078 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503718930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:57,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:57,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:57,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455254582] [2021-06-05 21:38:57,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:57,152 INFO L87 Difference]: Start difference. First operand 40328 states and 136559 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:57,567 INFO L93 Difference]: Finished difference Result 47750 states and 159770 transitions. [2021-06-05 21:38:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:38:57,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:57,675 INFO L225 Difference]: With dead ends: 47750 [2021-06-05 21:38:57,675 INFO L226 Difference]: Without dead ends: 47750 [2021-06-05 21:38:57,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:38:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47750 states. [2021-06-05 21:38:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47750 to 35545. [2021-06-05 21:38:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35545 states, 35544 states have (on average 3.380429889714157) internal successors, (120154), 35544 states have internal predecessors, (120154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35545 states to 35545 states and 120154 transitions. [2021-06-05 21:38:58,426 INFO L78 Accepts]: Start accepts. Automaton has 35545 states and 120154 transitions. Word has length 22 [2021-06-05 21:38:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:58,426 INFO L482 AbstractCegarLoop]: Abstraction has 35545 states and 120154 transitions. [2021-06-05 21:38:58,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35545 states and 120154 transitions. [2021-06-05 21:38:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:58,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:58,436 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:58,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21625,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:58,637 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 474153079, now seen corresponding path program 260 times [2021-06-05 21:38:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:58,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761115712] [2021-06-05 21:38:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:58,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:58,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761115712] [2021-06-05 21:38:58,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761115712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:58,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015813485] [2021-06-05 21:38:58,709 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:38:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:38:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015813485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:58,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:58,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:38:58,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792321767] [2021-06-05 21:38:58,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:38:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:38:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:38:58,788 INFO L87 Difference]: Start difference. First operand 35545 states and 120154 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:59,130 INFO L93 Difference]: Finished difference Result 36460 states and 122661 transitions. [2021-06-05 21:38:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:38:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:38:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:59,206 INFO L225 Difference]: With dead ends: 36460 [2021-06-05 21:38:59,206 INFO L226 Difference]: Without dead ends: 36453 [2021-06-05 21:38:59,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:38:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36453 states. [2021-06-05 21:38:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36453 to 35618. [2021-06-05 21:38:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35618 states, 35617 states have (on average 3.3797624729763878) internal successors, (120377), 35617 states have internal predecessors, (120377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35618 states to 35618 states and 120377 transitions. [2021-06-05 21:38:59,882 INFO L78 Accepts]: Start accepts. Automaton has 35618 states and 120377 transitions. Word has length 22 [2021-06-05 21:38:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:59,882 INFO L482 AbstractCegarLoop]: Abstraction has 35618 states and 120377 transitions. [2021-06-05 21:38:59,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35618 states and 120377 transitions. [2021-06-05 21:38:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:38:59,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:59,892 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:00,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21626,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:00,092 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 215665124, now seen corresponding path program 261 times [2021-06-05 21:39:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:00,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497762957] [2021-06-05 21:39:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:00,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:00,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497762957] [2021-06-05 21:39:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497762957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:00,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485717521] [2021-06-05 21:39:00,172 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:00,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:39:00,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:00,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:00,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485717521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:00,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:00,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:00,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865297669] [2021-06-05 21:39:00,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:00,275 INFO L87 Difference]: Start difference. First operand 35618 states and 120377 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:00,773 INFO L93 Difference]: Finished difference Result 40432 states and 135039 transitions. [2021-06-05 21:39:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:39:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:00,858 INFO L225 Difference]: With dead ends: 40432 [2021-06-05 21:39:00,858 INFO L226 Difference]: Without dead ends: 40432 [2021-06-05 21:39:00,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:39:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40432 states. [2021-06-05 21:39:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40432 to 35682. [2021-06-05 21:39:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35682 states, 35681 states have (on average 3.3822202292536643) internal successors, (120681), 35681 states have internal predecessors, (120681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35682 states to 35682 states and 120681 transitions. [2021-06-05 21:39:01,539 INFO L78 Accepts]: Start accepts. Automaton has 35682 states and 120681 transitions. Word has length 22 [2021-06-05 21:39:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:01,539 INFO L482 AbstractCegarLoop]: Abstraction has 35682 states and 120681 transitions. [2021-06-05 21:39:01,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 35682 states and 120681 transitions. [2021-06-05 21:39:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:01,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:01,549 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21627,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:01,749 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1231478759, now seen corresponding path program 262 times [2021-06-05 21:39:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397573839] [2021-06-05 21:39:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:01,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397573839] [2021-06-05 21:39:01,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397573839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692540704] [2021-06-05 21:39:01,835 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:01,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:01,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692540704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:01,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:01,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:01,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273396458] [2021-06-05 21:39:01,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:01,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:01,898 INFO L87 Difference]: Start difference. First operand 35682 states and 120681 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:02,192 INFO L93 Difference]: Finished difference Result 36907 states and 124167 transitions. [2021-06-05 21:39:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:39:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:02,269 INFO L225 Difference]: With dead ends: 36907 [2021-06-05 21:39:02,269 INFO L226 Difference]: Without dead ends: 36901 [2021-06-05 21:39:02,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36901 states. [2021-06-05 21:39:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36901 to 35689. [2021-06-05 21:39:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 35688 states have (on average 3.3821452589105583) internal successors, (120702), 35688 states have internal predecessors, (120702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 120702 transitions. [2021-06-05 21:39:02,899 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 120702 transitions. Word has length 22 [2021-06-05 21:39:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:02,899 INFO L482 AbstractCegarLoop]: Abstraction has 35689 states and 120702 transitions. [2021-06-05 21:39:02,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 120702 transitions. [2021-06-05 21:39:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:02,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:02,909 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:03,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21628 [2021-06-05 21:39:03,109 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1067480988, now seen corresponding path program 263 times [2021-06-05 21:39:03,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:03,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486394403] [2021-06-05 21:39:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:03,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486394403] [2021-06-05 21:39:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486394403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100060006] [2021-06-05 21:39:03,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:03,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:39:03,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:03,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100060006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927730459] [2021-06-05 21:39:03,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:03,243 INFO L87 Difference]: Start difference. First operand 35689 states and 120702 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:03,586 INFO L93 Difference]: Finished difference Result 37769 states and 126742 transitions. [2021-06-05 21:39:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:39:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:03,661 INFO L225 Difference]: With dead ends: 37769 [2021-06-05 21:39:03,661 INFO L226 Difference]: Without dead ends: 37769 [2021-06-05 21:39:03,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:39:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37769 states. [2021-06-05 21:39:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37769 to 35344. [2021-06-05 21:39:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387177093059446) internal successors, (119713), 35343 states have internal predecessors, (119713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119713 transitions. [2021-06-05 21:39:04,407 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119713 transitions. Word has length 22 [2021-06-05 21:39:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119713 transitions. [2021-06-05 21:39:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119713 transitions. [2021-06-05 21:39:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:04,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:04,416 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:04,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21629,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:04,617 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2076450211, now seen corresponding path program 264 times [2021-06-05 21:39:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:04,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804504726] [2021-06-05 21:39:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:04,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:04,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804504726] [2021-06-05 21:39:04,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804504726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:04,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224478170] [2021-06-05 21:39:04,688 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:04,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:39:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224478170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:04,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:04,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:04,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413688907] [2021-06-05 21:39:04,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:04,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:04,753 INFO L87 Difference]: Start difference. First operand 35344 states and 119713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:05,025 INFO L93 Difference]: Finished difference Result 35796 states and 120895 transitions. [2021-06-05 21:39:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:39:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:05,101 INFO L225 Difference]: With dead ends: 35796 [2021-06-05 21:39:05,101 INFO L226 Difference]: Without dead ends: 35789 [2021-06-05 21:39:05,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35789 states. [2021-06-05 21:39:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35789 to 35344. [2021-06-05 21:39:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387148798913505) internal successors, (119712), 35343 states have internal predecessors, (119712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119712 transitions. [2021-06-05 21:39:05,715 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119712 transitions. Word has length 22 [2021-06-05 21:39:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:05,715 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119712 transitions. [2021-06-05 21:39:05,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119712 transitions. [2021-06-05 21:39:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:05,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:05,725 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:05,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21630 [2021-06-05 21:39:05,925 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1960029130, now seen corresponding path program 265 times [2021-06-05 21:39:05,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:05,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348369226] [2021-06-05 21:39:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:05,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348369226] [2021-06-05 21:39:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348369226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362987745] [2021-06-05 21:39:05,991 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:06,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362987745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:06,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:06,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:06,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342180174] [2021-06-05 21:39:06,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:06,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:06,059 INFO L87 Difference]: Start difference. First operand 35344 states and 119712 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:06,468 INFO L93 Difference]: Finished difference Result 36722 states and 123439 transitions. [2021-06-05 21:39:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:39:06,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:06,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:06,685 INFO L225 Difference]: With dead ends: 36722 [2021-06-05 21:39:06,685 INFO L226 Difference]: Without dead ends: 36722 [2021-06-05 21:39:06,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:39:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2021-06-05 21:39:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 35442. [2021-06-05 21:39:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.387799441325019) internal successors, (120067), 35441 states have internal predecessors, (120067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120067 transitions. [2021-06-05 21:39:07,256 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120067 transitions. Word has length 22 [2021-06-05 21:39:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:07,256 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120067 transitions. [2021-06-05 21:39:07,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120067 transitions. [2021-06-05 21:39:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:07,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:07,266 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:07,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21631 [2021-06-05 21:39:07,481 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1794205849, now seen corresponding path program 266 times [2021-06-05 21:39:07,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:07,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612370470] [2021-06-05 21:39:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:07,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612370470] [2021-06-05 21:39:07,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612370470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845732347] [2021-06-05 21:39:07,559 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:07,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845732347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:07,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:07,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:07,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578416746] [2021-06-05 21:39:07,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:07,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:07,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:07,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:07,626 INFO L87 Difference]: Start difference. First operand 35442 states and 120067 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:07,895 INFO L93 Difference]: Finished difference Result 35860 states and 121183 transitions. [2021-06-05 21:39:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:39:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:07,980 INFO L225 Difference]: With dead ends: 35860 [2021-06-05 21:39:07,980 INFO L226 Difference]: Without dead ends: 35852 [2021-06-05 21:39:07,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2021-06-05 21:39:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 35442. [2021-06-05 21:39:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.38777122541689) internal successors, (120066), 35441 states have internal predecessors, (120066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120066 transitions. [2021-06-05 21:39:08,620 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120066 transitions. Word has length 22 [2021-06-05 21:39:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:08,621 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120066 transitions. [2021-06-05 21:39:08,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120066 transitions. [2021-06-05 21:39:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:08,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:08,631 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:08,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21632 [2021-06-05 21:39:08,831 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1323562276, now seen corresponding path program 267 times [2021-06-05 21:39:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:08,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108100699] [2021-06-05 21:39:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:08,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:08,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108100699] [2021-06-05 21:39:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108100699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:08,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479127738] [2021-06-05 21:39:08,908 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:08,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:39:08,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479127738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:08,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:08,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:08,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553244430] [2021-06-05 21:39:08,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:08,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:08,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:08,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:08,978 INFO L87 Difference]: Start difference. First operand 35442 states and 120066 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:09,652 INFO L93 Difference]: Finished difference Result 36817 states and 123640 transitions. [2021-06-05 21:39:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:39:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:09,733 INFO L225 Difference]: With dead ends: 36817 [2021-06-05 21:39:09,733 INFO L226 Difference]: Without dead ends: 36817 [2021-06-05 21:39:09,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:39:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-06-05 21:39:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 35424. [2021-06-05 21:39:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35424 states, 35423 states have (on average 3.3881376506789374) internal successors, (120018), 35423 states have internal predecessors, (120018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35424 states to 35424 states and 120018 transitions. [2021-06-05 21:39:10,359 INFO L78 Accepts]: Start accepts. Automaton has 35424 states and 120018 transitions. Word has length 22 [2021-06-05 21:39:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:10,359 INFO L482 AbstractCegarLoop]: Abstraction has 35424 states and 120018 transitions. [2021-06-05 21:39:10,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35424 states and 120018 transitions. [2021-06-05 21:39:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:10,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:10,369 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:10,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21633 [2021-06-05 21:39:10,585 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1304197875, now seen corresponding path program 268 times [2021-06-05 21:39:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:10,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074337774] [2021-06-05 21:39:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:10,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074337774] [2021-06-05 21:39:10,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074337774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760131582] [2021-06-05 21:39:10,959 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:10,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:11,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760131582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:11,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:11,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:11,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568422708] [2021-06-05 21:39:11,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:11,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:11,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:11,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:11,040 INFO L87 Difference]: Start difference. First operand 35424 states and 120018 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:11,331 INFO L93 Difference]: Finished difference Result 37279 states and 125493 transitions. [2021-06-05 21:39:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:39:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:11,409 INFO L225 Difference]: With dead ends: 37279 [2021-06-05 21:39:11,410 INFO L226 Difference]: Without dead ends: 37273 [2021-06-05 21:39:11,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37273 states. [2021-06-05 21:39:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37273 to 35486. [2021-06-05 21:39:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35486 states, 35485 states have (on average 3.3883049175708044) internal successors, (120234), 35485 states have internal predecessors, (120234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 120234 transitions. [2021-06-05 21:39:12,460 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 120234 transitions. Word has length 22 [2021-06-05 21:39:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:12,460 INFO L482 AbstractCegarLoop]: Abstraction has 35486 states and 120234 transitions. [2021-06-05 21:39:12,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 120234 transitions. [2021-06-05 21:39:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:12,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:12,470 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:12,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21634,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:12,681 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1468195646, now seen corresponding path program 269 times [2021-06-05 21:39:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:12,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128292636] [2021-06-05 21:39:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:12,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128292636] [2021-06-05 21:39:12,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128292636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9634937] [2021-06-05 21:39:12,744 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:12,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:39:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:12,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9634937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:12,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:12,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:12,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518243792] [2021-06-05 21:39:12,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:12,811 INFO L87 Difference]: Start difference. First operand 35486 states and 120234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:13,119 INFO L93 Difference]: Finished difference Result 36239 states and 122100 transitions. [2021-06-05 21:39:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:39:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:13,197 INFO L225 Difference]: With dead ends: 36239 [2021-06-05 21:39:13,197 INFO L226 Difference]: Without dead ends: 36239 [2021-06-05 21:39:13,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:39:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2021-06-05 21:39:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 35451. [2021-06-05 21:39:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.389026798307475) internal successors, (120141), 35450 states have internal predecessors, (120141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120141 transitions. [2021-06-05 21:39:13,987 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120141 transitions. Word has length 22 [2021-06-05 21:39:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:13,987 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120141 transitions. [2021-06-05 21:39:13,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120141 transitions. [2021-06-05 21:39:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:13,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:13,996 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:14,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21635,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:14,197 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash 459226423, now seen corresponding path program 270 times [2021-06-05 21:39:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:14,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235889377] [2021-06-05 21:39:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:14,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:14,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235889377] [2021-06-05 21:39:14,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235889377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:14,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487480283] [2021-06-05 21:39:14,268 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:14,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:39:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:14,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487480283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:14,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:14,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945209492] [2021-06-05 21:39:14,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:14,339 INFO L87 Difference]: Start difference. First operand 35451 states and 120141 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:14,606 INFO L93 Difference]: Finished difference Result 35974 states and 121515 transitions. [2021-06-05 21:39:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:39:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:14,669 INFO L225 Difference]: With dead ends: 35974 [2021-06-05 21:39:14,669 INFO L226 Difference]: Without dead ends: 35967 [2021-06-05 21:39:14,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35967 states. [2021-06-05 21:39:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35967 to 35451. [2021-06-05 21:39:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.3889985895627643) internal successors, (120140), 35450 states have internal predecessors, (120140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120140 transitions. [2021-06-05 21:39:15,453 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120140 transitions. Word has length 22 [2021-06-05 21:39:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:15,453 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120140 transitions. [2021-06-05 21:39:15,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120140 transitions. [2021-06-05 21:39:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:15,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:15,463 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:15,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21636,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:15,663 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 200738468, now seen corresponding path program 271 times [2021-06-05 21:39:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:15,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953415876] [2021-06-05 21:39:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:15,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:15,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953415876] [2021-06-05 21:39:15,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953415876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:15,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836226135] [2021-06-05 21:39:15,732 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:15,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:15,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836226135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:15,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:15,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:15,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442064280] [2021-06-05 21:39:15,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:15,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:15,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:15,798 INFO L87 Difference]: Start difference. First operand 35451 states and 120140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:16,118 INFO L93 Difference]: Finished difference Result 35935 states and 121243 transitions. [2021-06-05 21:39:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:39:16,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:16,198 INFO L225 Difference]: With dead ends: 35935 [2021-06-05 21:39:16,198 INFO L226 Difference]: Without dead ends: 35935 [2021-06-05 21:39:16,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:39:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35935 states. [2021-06-05 21:39:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35935 to 35458. [2021-06-05 21:39:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389062808472234) internal successors, (120166), 35457 states have internal predecessors, (120166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120166 transitions. [2021-06-05 21:39:17,024 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120166 transitions. Word has length 22 [2021-06-05 21:39:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:17,024 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120166 transitions. [2021-06-05 21:39:17,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120166 transitions. [2021-06-05 21:39:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:17,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:17,034 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:17,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21637,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:17,235 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash 34915187, now seen corresponding path program 272 times [2021-06-05 21:39:17,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:17,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221313730] [2021-06-05 21:39:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:17,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221313730] [2021-06-05 21:39:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221313730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438189224] [2021-06-05 21:39:17,315 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:17,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:17,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:17,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438189224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:17,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:17,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:17,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797240551] [2021-06-05 21:39:17,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:17,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:17,384 INFO L87 Difference]: Start difference. First operand 35458 states and 120166 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:17,637 INFO L93 Difference]: Finished difference Result 35954 states and 121474 transitions. [2021-06-05 21:39:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:39:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:17,702 INFO L225 Difference]: With dead ends: 35954 [2021-06-05 21:39:17,702 INFO L226 Difference]: Without dead ends: 35946 [2021-06-05 21:39:17,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35946 states. [2021-06-05 21:39:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35946 to 35458. [2021-06-05 21:39:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 21:39:18,534 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 21:39:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:18,535 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 21:39:18,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 21:39:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:18,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:18,545 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:18,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21638,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:18,745 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -435728386, now seen corresponding path program 273 times [2021-06-05 21:39:18,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:18,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068977138] [2021-06-05 21:39:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:18,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068977138] [2021-06-05 21:39:18,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068977138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574300106] [2021-06-05 21:39:18,814 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:39:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574300106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:18,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:18,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313486865] [2021-06-05 21:39:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:18,884 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:19,305 INFO L93 Difference]: Finished difference Result 35839 states and 120966 transitions. [2021-06-05 21:39:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:39:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:19,386 INFO L225 Difference]: With dead ends: 35839 [2021-06-05 21:39:19,386 INFO L226 Difference]: Without dead ends: 35839 [2021-06-05 21:39:19,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:39:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35839 states. [2021-06-05 21:39:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35839 to 35458. [2021-06-05 21:39:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 21:39:20,199 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 21:39:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:20,199 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 21:39:20,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 21:39:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:20,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:20,209 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:20,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21639,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:20,409 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash -233831241, now seen corresponding path program 274 times [2021-06-05 21:39:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:20,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729241635] [2021-06-05 21:39:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:20,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:20,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729241635] [2021-06-05 21:39:20,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729241635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:20,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274577919] [2021-06-05 21:39:20,494 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:20,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:20,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274577919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:20,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:20,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:20,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64375677] [2021-06-05 21:39:20,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:20,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:20,557 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:20,805 INFO L93 Difference]: Finished difference Result 35916 states and 121397 transitions. [2021-06-05 21:39:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:39:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:20,877 INFO L225 Difference]: With dead ends: 35916 [2021-06-05 21:39:20,877 INFO L226 Difference]: Without dead ends: 35907 [2021-06-05 21:39:20,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-06-05 21:39:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 35458. [2021-06-05 21:39:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389006402120879) internal successors, (120164), 35457 states have internal predecessors, (120164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120164 transitions. [2021-06-05 21:39:21,721 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120164 transitions. Word has length 22 [2021-06-05 21:39:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:21,722 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120164 transitions. [2021-06-05 21:39:21,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120164 transitions. [2021-06-05 21:39:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:21,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:21,731 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:21,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21640 [2021-06-05 21:39:21,932 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1308635620, now seen corresponding path program 275 times [2021-06-05 21:39:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:21,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690648511] [2021-06-05 21:39:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:22,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:22,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690648511] [2021-06-05 21:39:22,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690648511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:22,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266839430] [2021-06-05 21:39:22,015 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:22,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:39:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:22,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266839430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:22,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:22,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:22,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281975195] [2021-06-05 21:39:22,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:22,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:22,084 INFO L87 Difference]: Start difference. First operand 35458 states and 120164 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:22,812 INFO L93 Difference]: Finished difference Result 35992 states and 121396 transitions. [2021-06-05 21:39:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:39:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:22,879 INFO L225 Difference]: With dead ends: 35992 [2021-06-05 21:39:22,880 INFO L226 Difference]: Without dead ends: 35992 [2021-06-05 21:39:22,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:39:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35992 states. [2021-06-05 21:39:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35992 to 35459. [2021-06-05 21:39:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 3.3889954312143944) internal successors, (120167), 35458 states have internal predecessors, (120167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 120167 transitions. [2021-06-05 21:39:23,456 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 120167 transitions. Word has length 22 [2021-06-05 21:39:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:23,456 INFO L482 AbstractCegarLoop]: Abstraction has 35459 states and 120167 transitions. [2021-06-05 21:39:23,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 120167 transitions. [2021-06-05 21:39:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:23,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:23,465 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:23,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21641,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:23,665 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1917455481, now seen corresponding path program 276 times [2021-06-05 21:39:23,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:23,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9179699] [2021-06-05 21:39:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:23,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:23,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9179699] [2021-06-05 21:39:23,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9179699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:23,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897631886] [2021-06-05 21:39:23,728 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:23,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:39:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897631886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:39:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691403627] [2021-06-05 21:39:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:39:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:39:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:39:23,790 INFO L87 Difference]: Start difference. First operand 35459 states and 120167 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:24,186 INFO L93 Difference]: Finished difference Result 35845 states and 120782 transitions. [2021-06-05 21:39:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:39:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:24,267 INFO L225 Difference]: With dead ends: 35845 [2021-06-05 21:39:24,267 INFO L226 Difference]: Without dead ends: 35845 [2021-06-05 21:39:24,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35845 states. [2021-06-05 21:39:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35845 to 35470. [2021-06-05 21:39:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35470 states, 35469 states have (on average 3.389128534776847) internal successors, (120209), 35469 states have internal predecessors, (120209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35470 states to 35470 states and 120209 transitions. [2021-06-05 21:39:24,937 INFO L78 Accepts]: Start accepts. Automaton has 35470 states and 120209 transitions. Word has length 22 [2021-06-05 21:39:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:24,937 INFO L482 AbstractCegarLoop]: Abstraction has 35470 states and 120209 transitions. [2021-06-05 21:39:24,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35470 states and 120209 transitions. [2021-06-05 21:39:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:24,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:24,947 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:25,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21642 [2021-06-05 21:39:25,148 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash -834165348, now seen corresponding path program 277 times [2021-06-05 21:39:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:25,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541011077] [2021-06-05 21:39:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541011077] [2021-06-05 21:39:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541011077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031711860] [2021-06-05 21:39:25,206 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:25,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031711860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:25,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:25,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:39:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538096639] [2021-06-05 21:39:25,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:39:25,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:39:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:39:25,260 INFO L87 Difference]: Start difference. First operand 35470 states and 120209 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:25,457 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 21:39:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:25,699 INFO L93 Difference]: Finished difference Result 36773 states and 124101 transitions. [2021-06-05 21:39:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:39:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:25,773 INFO L225 Difference]: With dead ends: 36773 [2021-06-05 21:39:25,773 INFO L226 Difference]: Without dead ends: 36769 [2021-06-05 21:39:25,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:39:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2021-06-05 21:39:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 36539. [2021-06-05 21:39:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.388362800372215) internal successors, (123804), 36538 states have internal predecessors, (123804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123804 transitions. [2021-06-05 21:39:26,673 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123804 transitions. Word has length 22 [2021-06-05 21:39:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:26,673 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123804 transitions. [2021-06-05 21:39:26,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123804 transitions. [2021-06-05 21:39:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:26,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:26,689 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:26,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21643,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:26,905 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash -177363171, now seen corresponding path program 278 times [2021-06-05 21:39:26,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:26,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975119592] [2021-06-05 21:39:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:26,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975119592] [2021-06-05 21:39:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975119592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161736524] [2021-06-05 21:39:26,970 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:26,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161736524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:27,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:27,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:39:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292904130] [2021-06-05 21:39:27,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:39:27,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:27,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:39:27,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:39:27,030 INFO L87 Difference]: Start difference. First operand 36539 states and 123804 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:27,355 INFO L93 Difference]: Finished difference Result 36910 states and 124367 transitions. [2021-06-05 21:39:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:39:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:27,431 INFO L225 Difference]: With dead ends: 36910 [2021-06-05 21:39:27,431 INFO L226 Difference]: Without dead ends: 36909 [2021-06-05 21:39:27,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:39:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-06-05 21:39:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 36539. [2021-06-05 21:39:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.3881164814713447) internal successors, (123795), 36538 states have internal predecessors, (123795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123795 transitions. [2021-06-05 21:39:28,383 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123795 transitions. Word has length 22 [2021-06-05 21:39:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:28,383 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123795 transitions. [2021-06-05 21:39:28,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123795 transitions. [2021-06-05 21:39:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:28,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:28,393 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:28,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21644 [2021-06-05 21:39:28,594 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 745055562, now seen corresponding path program 279 times [2021-06-05 21:39:28,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:28,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589247056] [2021-06-05 21:39:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:28,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589247056] [2021-06-05 21:39:28,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589247056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982666892] [2021-06-05 21:39:28,651 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:39:28,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982666892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:28,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:28,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:39:28,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268753287] [2021-06-05 21:39:28,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:39:28,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:39:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:39:28,713 INFO L87 Difference]: Start difference. First operand 36539 states and 123795 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:28,927 INFO L93 Difference]: Finished difference Result 37170 states and 125257 transitions. [2021-06-05 21:39:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:39:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:29,003 INFO L225 Difference]: With dead ends: 37170 [2021-06-05 21:39:29,004 INFO L226 Difference]: Without dead ends: 37170 [2021-06-05 21:39:29,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:39:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2021-06-05 21:39:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 36554. [2021-06-05 21:39:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.3879024977430032) internal successors, (123838), 36553 states have internal predecessors, (123838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123838 transitions. [2021-06-05 21:39:29,846 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123838 transitions. Word has length 22 [2021-06-05 21:39:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:29,846 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123838 transitions. [2021-06-05 21:39:29,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123838 transitions. [2021-06-05 21:39:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:29,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:29,856 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:30,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21645 [2021-06-05 21:39:30,056 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1533250137, now seen corresponding path program 280 times [2021-06-05 21:39:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:30,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110101073] [2021-06-05 21:39:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:30,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:30,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110101073] [2021-06-05 21:39:30,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110101073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:30,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527634814] [2021-06-05 21:39:30,116 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:30,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:30,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527634814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:30,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:30,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514449600] [2021-06-05 21:39:30,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:30,187 INFO L87 Difference]: Start difference. First operand 36554 states and 123838 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:30,485 INFO L93 Difference]: Finished difference Result 36930 states and 124408 transitions. [2021-06-05 21:39:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:39:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:30,562 INFO L225 Difference]: With dead ends: 36930 [2021-06-05 21:39:30,563 INFO L226 Difference]: Without dead ends: 36928 [2021-06-05 21:39:30,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:39:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36928 states. [2021-06-05 21:39:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36928 to 36554. [2021-06-05 21:39:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.387847782671737) internal successors, (123836), 36553 states have internal predecessors, (123836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123836 transitions. [2021-06-05 21:39:31,413 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123836 transitions. Word has length 22 [2021-06-05 21:39:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:31,413 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123836 transitions. [2021-06-05 21:39:31,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123836 transitions. [2021-06-05 21:39:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:31,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:31,422 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:31,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21646,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:31,623 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -983991772, now seen corresponding path program 281 times [2021-06-05 21:39:31,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:31,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100528415] [2021-06-05 21:39:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:31,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100528415] [2021-06-05 21:39:31,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100528415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169421023] [2021-06-05 21:39:31,679 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:31,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:39:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169421023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:31,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:31,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271733562] [2021-06-05 21:39:31,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:31,747 INFO L87 Difference]: Start difference. First operand 36554 states and 123836 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:31,983 INFO L93 Difference]: Finished difference Result 37526 states and 126283 transitions. [2021-06-05 21:39:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:39:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:32,061 INFO L225 Difference]: With dead ends: 37526 [2021-06-05 21:39:32,061 INFO L226 Difference]: Without dead ends: 37526 [2021-06-05 21:39:32,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:39:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37526 states. [2021-06-05 21:39:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37526 to 36659. [2021-06-05 21:39:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36659 states, 36658 states have (on average 3.386627748376889) internal successors, (124147), 36658 states have internal predecessors, (124147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36659 states to 36659 states and 124147 transitions. [2021-06-05 21:39:33,005 INFO L78 Accepts]: Start accepts. Automaton has 36659 states and 124147 transitions. Word has length 22 [2021-06-05 21:39:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:33,005 INFO L482 AbstractCegarLoop]: Abstraction has 36659 states and 124147 transitions. [2021-06-05 21:39:33,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36659 states and 124147 transitions. [2021-06-05 21:39:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:33,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:33,014 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:33,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21647,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:33,215 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1272312163, now seen corresponding path program 282 times [2021-06-05 21:39:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:33,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965344665] [2021-06-05 21:39:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:33,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965344665] [2021-06-05 21:39:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965344665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152732333] [2021-06-05 21:39:33,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:33,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:39:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:33,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152732333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:33,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:33,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:33,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158659811] [2021-06-05 21:39:33,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:33,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:33,454 INFO L87 Difference]: Start difference. First operand 36659 states and 124147 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:33,746 INFO L93 Difference]: Finished difference Result 44560 states and 150459 transitions. [2021-06-05 21:39:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:39:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:33,835 INFO L225 Difference]: With dead ends: 44560 [2021-06-05 21:39:33,835 INFO L226 Difference]: Without dead ends: 44557 [2021-06-05 21:39:33,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:39:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44557 states. [2021-06-05 21:39:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44557 to 37399. [2021-06-05 21:39:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37399 states, 37398 states have (on average 3.3886571474410396) internal successors, (126729), 37398 states have internal predecessors, (126729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37399 states to 37399 states and 126729 transitions. [2021-06-05 21:39:34,815 INFO L78 Accepts]: Start accepts. Automaton has 37399 states and 126729 transitions. Word has length 22 [2021-06-05 21:39:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:34,815 INFO L482 AbstractCegarLoop]: Abstraction has 37399 states and 126729 transitions. [2021-06-05 21:39:34,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 37399 states and 126729 transitions. [2021-06-05 21:39:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:34,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:34,825 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:35,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21648,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:35,025 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1250115722, now seen corresponding path program 283 times [2021-06-05 21:39:35,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:35,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788684950] [2021-06-05 21:39:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:35,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788684950] [2021-06-05 21:39:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788684950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259157744] [2021-06-05 21:39:35,082 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:35,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259157744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:35,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:35,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668166107] [2021-06-05 21:39:35,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:35,151 INFO L87 Difference]: Start difference. First operand 37399 states and 126729 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:35,428 INFO L93 Difference]: Finished difference Result 46106 states and 155238 transitions. [2021-06-05 21:39:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:39:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:35,539 INFO L225 Difference]: With dead ends: 46106 [2021-06-05 21:39:35,539 INFO L226 Difference]: Without dead ends: 46106 [2021-06-05 21:39:35,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:39:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46106 states. [2021-06-05 21:39:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46106 to 41545. [2021-06-05 21:39:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41545 states, 41544 states have (on average 3.3881667629501253) internal successors, (140758), 41544 states have internal predecessors, (140758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41545 states to 41545 states and 140758 transitions. [2021-06-05 21:39:36,600 INFO L78 Accepts]: Start accepts. Automaton has 41545 states and 140758 transitions. Word has length 22 [2021-06-05 21:39:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:36,600 INFO L482 AbstractCegarLoop]: Abstraction has 41545 states and 140758 transitions. [2021-06-05 21:39:36,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41545 states and 140758 transitions. [2021-06-05 21:39:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:36,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:36,609 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:36,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21649,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:36,810 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1949569753, now seen corresponding path program 284 times [2021-06-05 21:39:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:36,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828919263] [2021-06-05 21:39:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:36,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828919263] [2021-06-05 21:39:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828919263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30702134] [2021-06-05 21:39:36,871 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:36,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30702134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:36,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:36,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743175067] [2021-06-05 21:39:36,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:36,933 INFO L87 Difference]: Start difference. First operand 41545 states and 140758 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:37,409 INFO L93 Difference]: Finished difference Result 46718 states and 157685 transitions. [2021-06-05 21:39:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:39:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:37,508 INFO L225 Difference]: With dead ends: 46718 [2021-06-05 21:39:37,508 INFO L226 Difference]: Without dead ends: 46714 [2021-06-05 21:39:37,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:39:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46714 states. [2021-06-05 21:39:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46714 to 41727. [2021-06-05 21:39:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41727 states, 41726 states have (on average 3.388486794804199) internal successors, (141388), 41726 states have internal predecessors, (141388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41727 states to 41727 states and 141388 transitions. [2021-06-05 21:39:38,584 INFO L78 Accepts]: Start accepts. Automaton has 41727 states and 141388 transitions. Word has length 22 [2021-06-05 21:39:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:38,584 INFO L482 AbstractCegarLoop]: Abstraction has 41727 states and 141388 transitions. [2021-06-05 21:39:38,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 41727 states and 141388 transitions. [2021-06-05 21:39:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:38,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:38,594 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:38,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21650 [2021-06-05 21:39:38,794 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1787971300, now seen corresponding path program 285 times [2021-06-05 21:39:38,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:38,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231263605] [2021-06-05 21:39:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:38,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231263605] [2021-06-05 21:39:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231263605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515281635] [2021-06-05 21:39:38,856 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:38,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:39:38,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:38,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515281635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:38,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:38,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:38,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570586913] [2021-06-05 21:39:38,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:38,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:38,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:38,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:38,929 INFO L87 Difference]: Start difference. First operand 41727 states and 141388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:39,215 INFO L93 Difference]: Finished difference Result 45021 states and 151377 transitions. [2021-06-05 21:39:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:39:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:39,303 INFO L225 Difference]: With dead ends: 45021 [2021-06-05 21:39:39,303 INFO L226 Difference]: Without dead ends: 45021 [2021-06-05 21:39:39,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:39:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45021 states. [2021-06-05 21:39:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45021 to 44522. [2021-06-05 21:39:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.3770580175647447) internal successors, (150350), 44521 states have internal predecessors, (150350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 150350 transitions. [2021-06-05 21:39:40,285 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 150350 transitions. Word has length 22 [2021-06-05 21:39:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:40,285 INFO L482 AbstractCegarLoop]: Abstraction has 44522 states and 150350 transitions. [2021-06-05 21:39:40,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 150350 transitions. [2021-06-05 21:39:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:40,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:40,294 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:40,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21651,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:40,495 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305955, now seen corresponding path program 286 times [2021-06-05 21:39:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:40,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349539754] [2021-06-05 21:39:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:40,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349539754] [2021-06-05 21:39:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349539754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393666426] [2021-06-05 21:39:40,559 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:40,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:40,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393666426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:40,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:40,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:40,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12735411] [2021-06-05 21:39:40,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:40,619 INFO L87 Difference]: Start difference. First operand 44522 states and 150350 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:40,900 INFO L93 Difference]: Finished difference Result 47600 states and 159895 transitions. [2021-06-05 21:39:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:39:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:40,994 INFO L225 Difference]: With dead ends: 47600 [2021-06-05 21:39:40,994 INFO L226 Difference]: Without dead ends: 47595 [2021-06-05 21:39:40,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:39:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47595 states. [2021-06-05 21:39:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47595 to 44534. [2021-06-05 21:39:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44534 states, 44533 states have (on average 3.377001324860216) internal successors, (150388), 44533 states have internal predecessors, (150388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44534 states to 44534 states and 150388 transitions. [2021-06-05 21:39:42,001 INFO L78 Accepts]: Start accepts. Automaton has 44534 states and 150388 transitions. Word has length 22 [2021-06-05 21:39:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 44534 states and 150388 transitions. [2021-06-05 21:39:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 44534 states and 150388 transitions. [2021-06-05 21:39:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:42,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:42,011 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:42,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21652 [2021-06-05 21:39:42,211 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1281625034, now seen corresponding path program 287 times [2021-06-05 21:39:42,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:42,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847423047] [2021-06-05 21:39:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:42,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847423047] [2021-06-05 21:39:42,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847423047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203316056] [2021-06-05 21:39:42,272 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:42,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:39:42,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:39:42,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203316056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:42,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:42,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:39:42,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777502396] [2021-06-05 21:39:42,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:39:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:39:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:39:42,336 INFO L87 Difference]: Start difference. First operand 44534 states and 150388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:42,549 INFO L93 Difference]: Finished difference Result 45136 states and 151973 transitions. [2021-06-05 21:39:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:39:42,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:42,635 INFO L225 Difference]: With dead ends: 45136 [2021-06-05 21:39:42,635 INFO L226 Difference]: Without dead ends: 45136 [2021-06-05 21:39:42,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:39:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45136 states. [2021-06-05 21:39:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45136 to 44984. [2021-06-05 21:39:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44984 states, 44983 states have (on average 3.373518884912078) internal successors, (151751), 44983 states have internal predecessors, (151751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44984 states to 44984 states and 151751 transitions. [2021-06-05 21:39:43,601 INFO L78 Accepts]: Start accepts. Automaton has 44984 states and 151751 transitions. Word has length 22 [2021-06-05 21:39:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:43,601 INFO L482 AbstractCegarLoop]: Abstraction has 44984 states and 151751 transitions. [2021-06-05 21:39:43,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 44984 states and 151751 transitions. [2021-06-05 21:39:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:43,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:43,610 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:43,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21653 [2021-06-05 21:39:43,811 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1694205095, now seen corresponding path program 288 times [2021-06-05 21:39:43,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:43,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608838340] [2021-06-05 21:39:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:43,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608838340] [2021-06-05 21:39:43,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608838340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782331157] [2021-06-05 21:39:43,882 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:43,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:39:43,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782331157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:43,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:43,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:43,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183512719] [2021-06-05 21:39:43,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:43,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:43,943 INFO L87 Difference]: Start difference. First operand 44984 states and 151751 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:44,517 INFO L93 Difference]: Finished difference Result 48063 states and 161244 transitions. [2021-06-05 21:39:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:39:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:44,630 INFO L225 Difference]: With dead ends: 48063 [2021-06-05 21:39:44,630 INFO L226 Difference]: Without dead ends: 48057 [2021-06-05 21:39:44,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2021-06-05 21:39:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 45252. [2021-06-05 21:39:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45251 states have (on average 3.37426797197852) internal successors, (152689), 45251 states have internal predecessors, (152689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 152689 transitions. [2021-06-05 21:39:45,775 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 152689 transitions. Word has length 22 [2021-06-05 21:39:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:45,775 INFO L482 AbstractCegarLoop]: Abstraction has 45252 states and 152689 transitions. [2021-06-05 21:39:45,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 152689 transitions. [2021-06-05 21:39:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:45,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:45,785 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:45,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21654 [2021-06-05 21:39:45,986 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1530207324, now seen corresponding path program 289 times [2021-06-05 21:39:45,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:45,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430339643] [2021-06-05 21:39:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:46,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430339643] [2021-06-05 21:39:46,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430339643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201169682] [2021-06-05 21:39:46,053 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:46,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201169682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:46,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:46,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:46,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892742077] [2021-06-05 21:39:46,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:46,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:46,117 INFO L87 Difference]: Start difference. First operand 45252 states and 152689 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:46,417 INFO L93 Difference]: Finished difference Result 45494 states and 153120 transitions. [2021-06-05 21:39:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:39:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:46,515 INFO L225 Difference]: With dead ends: 45494 [2021-06-05 21:39:46,516 INFO L226 Difference]: Without dead ends: 45494 [2021-06-05 21:39:46,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:39:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45494 states. [2021-06-05 21:39:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45494 to 45247. [2021-06-05 21:39:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.37428722981037) internal successors, (152673), 45246 states have internal predecessors, (152673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152673 transitions. [2021-06-05 21:39:47,506 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152673 transitions. Word has length 22 [2021-06-05 21:39:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:47,506 INFO L482 AbstractCegarLoop]: Abstraction has 45247 states and 152673 transitions. [2021-06-05 21:39:47,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152673 transitions. [2021-06-05 21:39:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:47,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:47,516 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:47,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21655 [2021-06-05 21:39:47,717 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1755790749, now seen corresponding path program 290 times [2021-06-05 21:39:47,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:47,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615306273] [2021-06-05 21:39:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:47,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615306273] [2021-06-05 21:39:47,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615306273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038934726] [2021-06-05 21:39:47,790 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:47,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:47,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:47,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038934726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:47,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:47,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:47,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865737627] [2021-06-05 21:39:47,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:47,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:47,857 INFO L87 Difference]: Start difference. First operand 45247 states and 152673 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:48,160 INFO L93 Difference]: Finished difference Result 45858 states and 154285 transitions. [2021-06-05 21:39:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:39:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:48,261 INFO L225 Difference]: With dead ends: 45858 [2021-06-05 21:39:48,261 INFO L226 Difference]: Without dead ends: 45851 [2021-06-05 21:39:48,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-06-05 21:39:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 45247. [2021-06-05 21:39:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.374265128409141) internal successors, (152672), 45246 states have internal predecessors, (152672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152672 transitions. [2021-06-05 21:39:49,301 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152672 transitions. Word has length 22 [2021-06-05 21:39:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:49,301 INFO L482 AbstractCegarLoop]: Abstraction has 45247 states and 152672 transitions. [2021-06-05 21:39:49,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152672 transitions. [2021-06-05 21:39:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:49,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:49,312 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:49,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21656 [2021-06-05 21:39:49,512 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:49,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1497302794, now seen corresponding path program 291 times [2021-06-05 21:39:49,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:49,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964230171] [2021-06-05 21:39:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:49,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964230171] [2021-06-05 21:39:49,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964230171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499412157] [2021-06-05 21:39:49,584 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:49,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:39:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499412157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513906274] [2021-06-05 21:39:49,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:49,651 INFO L87 Difference]: Start difference. First operand 45247 states and 152672 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:49,984 INFO L93 Difference]: Finished difference Result 45606 states and 153527 transitions. [2021-06-05 21:39:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:39:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:50,079 INFO L225 Difference]: With dead ends: 45606 [2021-06-05 21:39:50,079 INFO L226 Difference]: Without dead ends: 45606 [2021-06-05 21:39:50,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:39:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45606 states. [2021-06-05 21:39:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45606 to 45419. [2021-06-05 21:39:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.3728697873089963) internal successors, (153189), 45418 states have internal predecessors, (153189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153189 transitions. [2021-06-05 21:39:51,072 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153189 transitions. Word has length 22 [2021-06-05 21:39:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:51,072 INFO L482 AbstractCegarLoop]: Abstraction has 45419 states and 153189 transitions. [2021-06-05 21:39:51,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153189 transitions. [2021-06-05 21:39:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:51,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:51,083 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:51,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21657,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:51,298 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1331479513, now seen corresponding path program 292 times [2021-06-05 21:39:51,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:51,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033987172] [2021-06-05 21:39:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033987172] [2021-06-05 21:39:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033987172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799956708] [2021-06-05 21:39:51,374 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:51,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:39:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799956708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:51,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:51,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:51,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358459461] [2021-06-05 21:39:51,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:51,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:51,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:51,436 INFO L87 Difference]: Start difference. First operand 45419 states and 153189 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:52,079 INFO L93 Difference]: Finished difference Result 46001 states and 154730 transitions. [2021-06-05 21:39:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:39:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:52,178 INFO L225 Difference]: With dead ends: 46001 [2021-06-05 21:39:52,178 INFO L226 Difference]: Without dead ends: 45993 [2021-06-05 21:39:52,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45993 states. [2021-06-05 21:39:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45993 to 45419. [2021-06-05 21:39:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.372847769606764) internal successors, (153188), 45418 states have internal predecessors, (153188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153188 transitions. [2021-06-05 21:39:53,355 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153188 transitions. Word has length 22 [2021-06-05 21:39:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:53,355 INFO L482 AbstractCegarLoop]: Abstraction has 45419 states and 153188 transitions. [2021-06-05 21:39:53,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153188 transitions. [2021-06-05 21:39:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:53,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:53,365 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:53,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21658,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:53,573 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash 860835940, now seen corresponding path program 293 times [2021-06-05 21:39:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:53,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780999490] [2021-06-05 21:39:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:53,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:53,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780999490] [2021-06-05 21:39:53,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780999490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:53,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518218725] [2021-06-05 21:39:53,645 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:53,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:39:53,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:53,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:53,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518218725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:53,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:53,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:53,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184473029] [2021-06-05 21:39:53,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:53,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:53,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:53,714 INFO L87 Difference]: Start difference. First operand 45419 states and 153188 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:54,096 INFO L93 Difference]: Finished difference Result 45708 states and 153807 transitions. [2021-06-05 21:39:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:39:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:54,193 INFO L225 Difference]: With dead ends: 45708 [2021-06-05 21:39:54,193 INFO L226 Difference]: Without dead ends: 45708 [2021-06-05 21:39:54,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:39:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45708 states. [2021-06-05 21:39:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45708 to 45500. [2021-06-05 21:39:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372184004044045) internal successors, (153431), 45499 states have internal predecessors, (153431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153431 transitions. [2021-06-05 21:39:55,155 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153431 transitions. Word has length 22 [2021-06-05 21:39:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:55,155 INFO L482 AbstractCegarLoop]: Abstraction has 45500 states and 153431 transitions. [2021-06-05 21:39:55,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153431 transitions. [2021-06-05 21:39:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:55,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:55,166 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:55,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:55,366 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1062733085, now seen corresponding path program 294 times [2021-06-05 21:39:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:55,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804270629] [2021-06-05 21:39:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804270629] [2021-06-05 21:39:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804270629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823332800] [2021-06-05 21:39:55,448 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:55,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:39:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:55,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823332800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:55,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:55,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:55,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300606453] [2021-06-05 21:39:55,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:55,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:55,511 INFO L87 Difference]: Start difference. First operand 45500 states and 153431 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:55,805 INFO L93 Difference]: Finished difference Result 46053 states and 154900 transitions. [2021-06-05 21:39:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:39:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:55,901 INFO L225 Difference]: With dead ends: 46053 [2021-06-05 21:39:55,901 INFO L226 Difference]: Without dead ends: 46044 [2021-06-05 21:39:55,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46044 states. [2021-06-05 21:39:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46044 to 45500. [2021-06-05 21:39:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372162025539023) internal successors, (153430), 45499 states have internal predecessors, (153430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153430 transitions. [2021-06-05 21:39:56,908 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153430 transitions. Word has length 22 [2021-06-05 21:39:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:56,908 INFO L482 AbstractCegarLoop]: Abstraction has 45500 states and 153430 transitions. [2021-06-05 21:39:56,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153430 transitions. [2021-06-05 21:39:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:56,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:56,918 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:57,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21660 [2021-06-05 21:39:57,119 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1689767350, now seen corresponding path program 295 times [2021-06-05 21:39:57,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:57,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921948971] [2021-06-05 21:39:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:57,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921948971] [2021-06-05 21:39:57,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921948971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742734262] [2021-06-05 21:39:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:57,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742734262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:57,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:57,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504600561] [2021-06-05 21:39:57,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:57,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:57,262 INFO L87 Difference]: Start difference. First operand 45500 states and 153430 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:57,755 INFO L93 Difference]: Finished difference Result 45887 states and 154289 transitions. [2021-06-05 21:39:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:39:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:57,860 INFO L225 Difference]: With dead ends: 45887 [2021-06-05 21:39:57,860 INFO L226 Difference]: Without dead ends: 45887 [2021-06-05 21:39:57,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:39:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45887 states. [2021-06-05 21:39:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45887 to 45536. [2021-06-05 21:39:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.371867794004612) internal successors, (153538), 45535 states have internal predecessors, (153538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153538 transitions. [2021-06-05 21:39:58,865 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153538 transitions. Word has length 22 [2021-06-05 21:39:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:58,865 INFO L482 AbstractCegarLoop]: Abstraction has 45536 states and 153538 transitions. [2021-06-05 21:39:58,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153538 transitions. [2021-06-05 21:39:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:39:58,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:58,876 INFO L554 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:59,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21661 [2021-06-05 21:39:59,077 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1321528409, now seen corresponding path program 296 times [2021-06-05 21:39:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:59,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15297181] [2021-06-05 21:39:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:59,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15297181] [2021-06-05 21:39:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15297181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851846025] [2021-06-05 21:39:59,164 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:59,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:39:59,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:59,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:39:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851846025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:59,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:59,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:39:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801429185] [2021-06-05 21:39:59,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:39:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:39:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:39:59,227 INFO L87 Difference]: Start difference. First operand 45536 states and 153538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:59,700 INFO L93 Difference]: Finished difference Result 46048 states and 154924 transitions. [2021-06-05 21:39:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:39:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:39:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:59,791 INFO L225 Difference]: With dead ends: 46048 [2021-06-05 21:39:59,791 INFO L226 Difference]: Without dead ends: 46038 [2021-06-05 21:39:59,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:39:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46038 states. [2021-06-05 21:40:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46038 to 45536. Received shutdown request... [2021-06-05 21:40:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.3718458328758096) internal successors, (153537), 45535 states have internal predecessors, (153537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:00,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21662 [2021-06-05 21:40:00,631 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:40:00,633 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:40:00,634 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:40:00,635 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:40:00 BasicIcfg [2021-06-05 21:40:00,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:40:00,635 INFO L168 Benchmark]: Toolchain (without parser) took 894138.95 ms. Allocated memory was 362.8 MB in the beginning and 15.4 GB in the end (delta: 15.0 GB). Free memory was 342.1 MB in the beginning and 8.1 GB in the end (delta: -7.7 GB). Peak memory consumption was 7.4 GB. Max. memory is 16.0 GB. [2021-06-05 21:40:00,635 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory is still 343.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:40:00,635 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.87 ms. Allocated memory is still 362.8 MB. Free memory was 341.9 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:40:00,635 INFO L168 Benchmark]: Boogie Preprocessor took 15.73 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.6 MB in the end (delta: 891.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:40:00,635 INFO L168 Benchmark]: RCFGBuilder took 331.94 ms. Allocated memory is still 362.8 MB. Free memory was 339.5 MB in the beginning and 322.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:40:00,635 INFO L168 Benchmark]: TraceAbstraction took 893763.25 ms. Allocated memory was 362.8 MB in the beginning and 15.4 GB in the end (delta: 15.0 GB). Free memory was 322.0 MB in the beginning and 8.1 GB in the end (delta: -7.7 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. [2021-06-05 21:40:00,636 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory is still 343.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.87 ms. Allocated memory is still 362.8 MB. Free memory was 341.9 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.73 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.6 MB in the end (delta: 891.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 331.94 ms. Allocated memory is still 362.8 MB. Free memory was 339.5 MB in the beginning and 322.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 893763.25 ms. Allocated memory was 362.8 MB in the beginning and 15.4 GB in the end (delta: 15.0 GB). Free memory was 322.0 MB in the beginning and 8.1 GB in the end (delta: -7.7 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 893697.2ms, OverallIterations: 300, TraceHistogramMax: 11, EmptinessCheckTime: 1474.3ms, AutomataDifference: 77512.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6352 SDtfs, 24975 SDslu, 39149 SDs, 0 SdLazy, 43843 SolverSat, 7568 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17201.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12720 GetRequests, 5765 SyntacticMatches, 140 SemanticMatches, 6815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41822 ImplicationChecksByTransitivity, 38941.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 6233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 107862.7ms AutomataMinimizationTime, 300 MinimizatonAttempts, 288375 StatesRemovedByMinimization, 292 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 886.7ms SsaConstructionTime, 3213.9ms SatisfiabilityAnalysisTime, 636190.4ms InterpolantComputationTime, 12251 NumberOfCodeBlocks, 12250 NumberOfCodeBlocksAsserted, 1356 NumberOfCheckSat, 11654 ConstructedInterpolants, 0 QuantifiedInterpolants, 51300 SizeOfPredicates, 186 NumberOfNonLiveVariables, 24907 ConjunctsInSsa, 4305 ConjunctsInUnsatCore, 597 InterpolantComputations, 3 PerfectInterpolantSequences, 11169/32444 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