/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:09:34,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:09:34,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:09:34,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:09:34,246 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 21:09:34,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:09:34,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:09:34,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:09:34,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:09:34,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:09:34,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:09:34,282 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:09:34,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:09:34,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:09:34,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:09:34,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:09:34,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:09:34,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:09:34,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:09:34,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:09:34,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:09:34,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:09:34,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:09:34,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:09:34,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:09:34,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:09:34,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:09:34,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:09:34,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:09:34,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:09:34,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:09:34,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:09:34,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:09:34,602 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:09:34,603 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:09:34,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-06-05 21:09:34,604 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-06-05 21:09:34,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:09:34,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:09:34,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:09:34,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:09:34,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:09:34,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:09:34,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:09:34,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:09:34,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:09:34,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/1) ... [2021-06-05 21:09:34,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:09:34,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:09:34,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:09:34,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:09:34,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (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 21:09:34,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:09:34,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:09:34,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:09:34,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:09:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:09:34,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:09:34,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:09:34,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:09:34,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:09:34,761 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 21:09:34,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:09:34,953 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:09:34,954 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:09:34 BoogieIcfgContainer [2021-06-05 21:09:34,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:09:34,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:09:34,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:09:34,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:09:34,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:09:34" (1/2) ... [2021-06-05 21:09:34,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f40b85 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:09:34, skipping insertion in model container [2021-06-05 21:09:34,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:09:34" (2/2) ... [2021-06-05 21:09:34,960 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-06-05 21:09:34,964 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:09:34,964 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:09:34,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:09:34,965 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:09:35,023 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:09:35,039 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:09:35,055 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:09:35,055 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:09:35,056 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:09:35,056 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:09:35,056 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:09:35,056 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:09:35,056 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:09:35,056 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:09:35,063 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-06-05 21:09:35,075 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:09:35,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:35,082 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:35,083 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1207424972, now seen corresponding path program 1 times [2021-06-05 21:09:35,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:35,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590881718] [2021-06-05 21:09:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:35,250 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 21:09:35,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590881718] [2021-06-05 21:09:35,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590881718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:09:35,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:09:35,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:09:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410450573] [2021-06-05 21:09:35,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:09:35,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:09:35,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:09:35,272 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:35,313 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-06-05 21:09:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:09:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 21:09:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:35,327 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:09:35,328 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:09:35,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:09:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:09:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 21:09:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 21:09:35,376 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-06-05 21:09:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:35,376 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 21:09:35,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 21:09:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:09:35,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:35,381 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:35,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:09:35,383 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -680974379, now seen corresponding path program 1 times [2021-06-05 21:09:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287053240] [2021-06-05 21:09:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:35,447 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 21:09:35,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:35,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287053240] [2021-06-05 21:09:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287053240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:09:35,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:09:35,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:09:35,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197533870] [2021-06-05 21:09:35,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:09:35,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:09:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:09:35,451 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:35,493 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-06-05 21:09:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:09:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:09:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:35,496 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:09:35,496 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:09:35,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:09:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:09:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-06-05 21:09:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-06-05 21:09:35,510 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-06-05 21:09:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:35,511 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-06-05 21:09:35,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-06-05 21:09:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:09:35,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:35,512 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:35,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:09:35,514 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 2 times [2021-06-05 21:09:35,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:35,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873156982] [2021-06-05 21:09:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:35,570 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 21:09:35,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:35,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873156982] [2021-06-05 21:09:35,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873156982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:35,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905493626] [2021-06-05 21:09:35,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:09:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:35,680 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 21:09:35,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905493626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:35,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:35,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 21:09:35,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828486236] [2021-06-05 21:09:35,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:09:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:09:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:09:35,682 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:09:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:35,725 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-06-05 21:09:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:09:35,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 15 [2021-06-05 21:09:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:35,727 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:09:35,727 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:09:35,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:09:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:09:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-06-05 21:09:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-06-05 21:09:35,737 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-06-05 21:09:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:35,737 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-06-05 21:09:35,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:09:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-06-05 21:09:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:09:35,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:35,739 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:35,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 21:09:35,957 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-06-05 21:09:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:35,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306700451] [2021-06-05 21:09:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:36,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306700451] [2021-06-05 21:09:36,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306700451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:36,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781256091] [2021-06-05 21:09:36,191 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 21:09:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:36,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:09:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:36,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781256091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:36,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:36,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:09:36,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308874305] [2021-06-05 21:09:36,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:09:36,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:09:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:09:36,342 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:36,536 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-06-05 21:09:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:09:36,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:09:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:36,540 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:09:36,540 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:09:36,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:09:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-06-05 21:09:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-06-05 21:09:36,602 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-06-05 21:09:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:36,603 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-06-05 21:09:36,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-06-05 21:09:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:09:36,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:36,604 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:36,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:36,813 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-06-05 21:09:36,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:36,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134239799] [2021-06-05 21:09:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:36,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:36,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134239799] [2021-06-05 21:09:36,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134239799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:09:36,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:09:36,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:09:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545733658] [2021-06-05 21:09:36,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:09:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:09:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:09:36,862 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:36,884 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-06-05 21:09:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:09:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 21:09:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:36,885 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:09:36,885 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:09:36,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:09:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:09:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-06-05 21:09:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-06-05 21:09:36,896 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-06-05 21:09:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:36,896 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-06-05 21:09:36,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-06-05 21:09:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:36,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:36,902 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:36,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:09:36,902 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-06-05 21:09:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:36,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108601317] [2021-06-05 21:09:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:36,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108601317] [2021-06-05 21:09:36,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108601317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535370567] [2021-06-05 21:09:36,962 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 21:09:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:09:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:37,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535370567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:37,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:37,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:09:37,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559992659] [2021-06-05 21:09:37,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:09:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:09:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:09:37,095 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:37,180 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-06-05 21:09:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:09:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:37,183 INFO L225 Difference]: With dead ends: 323 [2021-06-05 21:09:37,183 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 21:09:37,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:09:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 21:09:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-06-05 21:09:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-06-05 21:09:37,191 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-06-05 21:09:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:37,191 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-06-05 21:09:37,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-06-05 21:09:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:37,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:37,194 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:37,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:37,398 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-06-05 21:09:37,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:37,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418713507] [2021-06-05 21:09:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:37,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418713507] [2021-06-05 21:09:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418713507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944308864] [2021-06-05 21:09:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:09:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:09:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944308864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:37,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:09:37,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422348140] [2021-06-05 21:09:37,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:37,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:37,871 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:38,303 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-06-05 21:09:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:09:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:38,307 INFO L225 Difference]: With dead ends: 526 [2021-06-05 21:09:38,307 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 21:09:38,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:09:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 21:09:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-06-05 21:09:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-06-05 21:09:38,324 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-06-05 21:09:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:38,324 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-06-05 21:09:38,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-06-05 21:09:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:38,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:38,326 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:38,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:38,549 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-06-05 21:09:38,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89901104] [2021-06-05 21:09:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:38,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89901104] [2021-06-05 21:09:38,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89901104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547663352] [2021-06-05 21:09:38,735 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 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 21:09:38,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:09:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547663352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:38,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:09:38,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105033085] [2021-06-05 21:09:38,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:38,916 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:39,267 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-06-05 21:09:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:09:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:39,270 INFO L225 Difference]: With dead ends: 636 [2021-06-05 21:09:39,270 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 21:09:39,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:09:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 21:09:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-06-05 21:09:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 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 21:09:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-06-05 21:09:39,284 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-06-05 21:09:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:39,285 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-06-05 21:09:39,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-06-05 21:09:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:39,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:39,287 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:39,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:39,509 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-06-05 21:09:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:39,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429008467] [2021-06-05 21:09:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:39,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:39,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429008467] [2021-06-05 21:09:39,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429008467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043430329] [2021-06-05 21:09:39,639 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 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 21:09:39,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:09:39,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:09:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:39,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043430329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:39,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:09:39,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960644249] [2021-06-05 21:09:39,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:39,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:39,827 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 21:09:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:40,135 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-06-05 21:09:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:40,139 INFO L225 Difference]: With dead ends: 772 [2021-06-05 21:09:40,139 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 21:09:40,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 21:09:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-06-05 21:09:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-06-05 21:09:40,160 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-06-05 21:09:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:40,161 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-06-05 21:09:40,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 21:09:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-06-05 21:09:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:40,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:40,163 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:40,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:40,377 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-06-05 21:09:40,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:40,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778697651] [2021-06-05 21:09:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:40,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778697651] [2021-06-05 21:09:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778697651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:40,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262884252] [2021-06-05 21:09:40,550 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 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 21:09:40,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:09:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:40,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262884252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:40,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:40,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:09:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623250940] [2021-06-05 21:09:40,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:40,718 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:41,007 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-06-05 21:09:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:09:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:41,011 INFO L225 Difference]: With dead ends: 760 [2021-06-05 21:09:41,011 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 21:09:41,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:09:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 21:09:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-06-05 21:09:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-06-05 21:09:41,028 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-06-05 21:09:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:41,028 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-06-05 21:09:41,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-06-05 21:09:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:09:41,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:41,030 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:41,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:09:41,254 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-06-05 21:09:41,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:41,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876044166] [2021-06-05 21:09:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:41,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876044166] [2021-06-05 21:09:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876044166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280468784] [2021-06-05 21:09:41,397 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 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 21:09:41,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:09:41,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:41,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:09:41,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:41,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280468784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:41,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:41,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:09:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087776426] [2021-06-05 21:09:41,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:41,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:41,561 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:41,885 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-06-05 21:09:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:09:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:09:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:41,889 INFO L225 Difference]: With dead ends: 812 [2021-06-05 21:09:41,889 INFO L226 Difference]: Without dead ends: 805 [2021-06-05 21:09:41,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:09:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-05 21:09:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-06-05 21:09:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-06-05 21:09:41,908 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-06-05 21:09:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:41,908 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-06-05 21:09:41,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-06-05 21:09:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:41,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:41,910 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:42,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 21:09:42,133 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-06-05 21:09:42,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:42,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270557467] [2021-06-05 21:09:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:42,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:42,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270557467] [2021-06-05 21:09:42,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270557467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:42,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692550127] [2021-06-05 21:09:42,301 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 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 21:09:42,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:09:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:42,529 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 21:09:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692550127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:42,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:42,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011055222] [2021-06-05 21:09:42,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:42,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:42,530 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:43,191 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-06-05 21:09:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:09:43,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:43,197 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 21:09:43,197 INFO L226 Difference]: Without dead ends: 1411 [2021-06-05 21:09:43,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:09:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-05 21:09:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-06-05 21:09:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-06-05 21:09:43,229 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-06-05 21:09:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:43,230 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-06-05 21:09:43,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-06-05 21:09:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:43,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:43,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:43,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:43,446 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:43,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:43,446 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-06-05 21:09:43,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:43,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196475899] [2021-06-05 21:09:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:43,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:43,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196475899] [2021-06-05 21:09:43,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196475899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456621082] [2021-06-05 21:09:43,483 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 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 21:09:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:09:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:43,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456621082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:43,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:09:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974281161] [2021-06-05 21:09:43,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:09:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:09:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:09:43,567 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 21:09:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:43,620 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-06-05 21:09:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:09:43,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:43,625 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 21:09:43,625 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 21:09:43,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:09:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 21:09:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-06-05 21:09:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-06-05 21:09:43,650 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-06-05 21:09:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:43,650 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-06-05 21:09:43,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 21:09:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-06-05 21:09:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:43,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:43,653 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:43,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:43,869 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-06-05 21:09:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335901979] [2021-06-05 21:09:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:43,903 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 21:09:43,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335901979] [2021-06-05 21:09:43,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335901979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386010295] [2021-06-05 21:09:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:43,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:43,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:09:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:43,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386010295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:43,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:09:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895172806] [2021-06-05 21:09:43,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:09:43,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:43,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:09:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:09:43,973 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 21:09:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:44,030 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-06-05 21:09:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:09:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 25 [2021-06-05 21:09:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:44,038 INFO L225 Difference]: With dead ends: 1948 [2021-06-05 21:09:44,039 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 21:09:44,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:09:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 21:09:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-06-05 21:09:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-06-05 21:09:44,083 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-06-05 21:09:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:44,084 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-06-05 21:09:44,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 21:09:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-06-05 21:09:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:44,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:44,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:44,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 21:09:44,310 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:44,311 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-06-05 21:09:44,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:44,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209732995] [2021-06-05 21:09:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:44,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209732995] [2021-06-05 21:09:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209732995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513865766] [2021-06-05 21:09:44,343 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 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 21:09:44,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:09:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:09:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513865766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:44,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:09:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627077537] [2021-06-05 21:09:44,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:09:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:09:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:09:44,434 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 21:09:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:44,488 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-06-05 21:09:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:09:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 25 [2021-06-05 21:09:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:44,497 INFO L225 Difference]: With dead ends: 1941 [2021-06-05 21:09:44,497 INFO L226 Difference]: Without dead ends: 1938 [2021-06-05 21:09:44,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:09:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-05 21:09:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-06-05 21:09:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-06-05 21:09:44,542 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-06-05 21:09:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:44,542 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-06-05 21:09:44,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 21:09:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-06-05 21:09:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:44,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:44,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:44,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:09:44,770 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-06-05 21:09:44,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:44,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093690911] [2021-06-05 21:09:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:44,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093690911] [2021-06-05 21:09:44,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093690911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379583022] [2021-06-05 21:09:44,798 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 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 21:09:44,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:09:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:44,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379583022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:44,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:09:44,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393797678] [2021-06-05 21:09:44,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:09:44,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:09:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:09:44,864 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 21:09:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:44,933 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-06-05 21:09:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:09:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 25 [2021-06-05 21:09:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:44,941 INFO L225 Difference]: With dead ends: 1932 [2021-06-05 21:09:44,941 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 21:09:44,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:09:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 21:09:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-06-05 21:09:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-06-05 21:09:45,002 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-06-05 21:09:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:45,003 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-06-05 21:09:45,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 21:09:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-06-05 21:09:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:45,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:45,008 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:09:45,225 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-06-05 21:09:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104479298] [2021-06-05 21:09:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:45,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104479298] [2021-06-05 21:09:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104479298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580324960] [2021-06-05 21:09:45,379 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 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 21:09:45,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:09:45,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:45,584 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 21:09:45,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580324960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:45,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:45,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:45,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488555554] [2021-06-05 21:09:45,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:45,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:45,586 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:46,212 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-06-05 21:09:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:09:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:46,222 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 21:09:46,223 INFO L226 Difference]: Without dead ends: 2634 [2021-06-05 21:09:46,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:09:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-06-05 21:09:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-06-05 21:09:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-06-05 21:09:46,287 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-06-05 21:09:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:46,287 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-06-05 21:09:46,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-06-05 21:09:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:46,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:46,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:46,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:46,505 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-06-05 21:09:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016872696] [2021-06-05 21:09:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:46,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:46,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016872696] [2021-06-05 21:09:46,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016872696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:46,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095533844] [2021-06-05 21:09:46,640 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 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 21:09:46,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:09:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:46,911 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 21:09:46,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095533844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:46,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:46,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:46,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036949700] [2021-06-05 21:09:46,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:46,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:46,912 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:47,521 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-06-05 21:09:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:09:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:47,530 INFO L225 Difference]: With dead ends: 2799 [2021-06-05 21:09:47,530 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 21:09:47,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:09:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 21:09:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-06-05 21:09:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-06-05 21:09:47,605 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-06-05 21:09:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:47,606 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-06-05 21:09:47,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-06-05 21:09:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:47,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:47,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:47,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:09:47,825 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-06-05 21:09:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:47,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111883795] [2021-06-05 21:09:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:47,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111883795] [2021-06-05 21:09:47,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111883795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067170606] [2021-06-05 21:09:47,969 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 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 21:09:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:48,194 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 21:09:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067170606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:48,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:48,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8510289] [2021-06-05 21:09:48,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:48,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:48,196 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:48,847 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-06-05 21:09:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:09:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:48,857 INFO L225 Difference]: With dead ends: 3085 [2021-06-05 21:09:48,857 INFO L226 Difference]: Without dead ends: 3052 [2021-06-05 21:09:48,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:09:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-05 21:09:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-06-05 21:09:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-06-05 21:09:48,911 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-06-05 21:09:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:48,911 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-06-05 21:09:48,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-06-05 21:09:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:48,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:48,915 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:49,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:49,128 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-06-05 21:09:49,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:49,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825148683] [2021-06-05 21:09:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:49,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:49,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825148683] [2021-06-05 21:09:49,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825148683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944179559] [2021-06-05 21:09:49,255 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 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 21:09:49,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:49,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:49,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944179559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:49,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:49,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053101764] [2021-06-05 21:09:49,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:49,467 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:50,114 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-06-05 21:09:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:09:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:50,122 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 21:09:50,122 INFO L226 Difference]: Without dead ends: 3367 [2021-06-05 21:09:50,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:09:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-06-05 21:09:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-06-05 21:09:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-06-05 21:09:50,181 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-06-05 21:09:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:50,181 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-06-05 21:09:50,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-06-05 21:09:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:50,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:50,185 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:50,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:50,409 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-06-05 21:09:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:50,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383348124] [2021-06-05 21:09:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383348124] [2021-06-05 21:09:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383348124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145471762] [2021-06-05 21:09:50,558 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 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 21:09:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:09:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:50,783 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 21:09:50,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145471762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:50,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:50,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677148627] [2021-06-05 21:09:50,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:50,786 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:51,265 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-06-05 21:09:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:09:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:51,271 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 21:09:51,272 INFO L226 Difference]: Without dead ends: 3410 [2021-06-05 21:09:51,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:09:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-06-05 21:09:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-06-05 21:09:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-06-05 21:09:51,330 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-06-05 21:09:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:51,330 INFO L482 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-06-05 21:09:51,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-06-05 21:09:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:51,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:51,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:51,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:09:51,559 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-06-05 21:09:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:51,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474586004] [2021-06-05 21:09:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:51,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:51,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474586004] [2021-06-05 21:09:51,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474586004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:51,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069851617] [2021-06-05 21:09:51,705 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 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 21:09:51,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:51,875 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 21:09:51,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069851617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:51,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:51,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273513146] [2021-06-05 21:09:51,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:51,876 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:52,337 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-06-05 21:09:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:09:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:52,346 INFO L225 Difference]: With dead ends: 3520 [2021-06-05 21:09:52,346 INFO L226 Difference]: Without dead ends: 3507 [2021-06-05 21:09:52,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:09:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-06-05 21:09:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-06-05 21:09:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-06-05 21:09:52,451 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-06-05 21:09:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:52,451 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-06-05 21:09:52,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-06-05 21:09:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:09:52,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:52,457 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:52,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:52,673 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-06-05 21:09:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176003072] [2021-06-05 21:09:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:52,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176003072] [2021-06-05 21:09:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176003072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117701499] [2021-06-05 21:09:52,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:09:52,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:09:52,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:52,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:53,060 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 21:09:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117701499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:53,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:53,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:09:53,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182336359] [2021-06-05 21:09:53,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:09:53,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:09:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:53,061 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:53,535 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-06-05 21:09:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:09:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:09:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:53,543 INFO L225 Difference]: With dead ends: 3850 [2021-06-05 21:09:53,543 INFO L226 Difference]: Without dead ends: 3817 [2021-06-05 21:09:53,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:09:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-05 21:09:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-06-05 21:09:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-06-05 21:09:53,598 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-06-05 21:09:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:53,598 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-06-05 21:09:53,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-06-05 21:09:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:09:53,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:53,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:53,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:09:53,826 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-06-05 21:09:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:53,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410384853] [2021-06-05 21:09:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:53,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410384853] [2021-06-05 21:09:53,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410384853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758534868] [2021-06-05 21:09:53,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:53,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:09:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:09:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:54,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758534868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:54,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:54,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:09:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564118369] [2021-06-05 21:09:54,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:54,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:54,103 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:54,295 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-06-05 21:09:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:09:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:09:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:54,299 INFO L225 Difference]: With dead ends: 3385 [2021-06-05 21:09:54,299 INFO L226 Difference]: Without dead ends: 3093 [2021-06-05 21:09:54,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-06-05 21:09:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-06-05 21:09:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-06-05 21:09:54,345 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-06-05 21:09:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:54,345 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-06-05 21:09:54,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-06-05 21:09:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:09:54,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:54,350 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:54,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:09:54,572 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-06-05 21:09:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684028949] [2021-06-05 21:09:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684028949] [2021-06-05 21:09:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684028949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362714535] [2021-06-05 21:09:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:09:54,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:09:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:09:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:55,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362714535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:55,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:55,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 21:09:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128359458] [2021-06-05 21:09:55,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:09:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:09:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:09:55,014 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:55,828 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-06-05 21:09:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:09:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:09:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:55,832 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 21:09:55,832 INFO L226 Difference]: Without dead ends: 3772 [2021-06-05 21:09:55,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:09:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-06-05 21:09:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-06-05 21:09:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-06-05 21:09:55,883 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-06-05 21:09:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:55,883 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-06-05 21:09:55,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-06-05 21:09:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:09:55,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:55,887 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:56,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:56,101 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-06-05 21:09:56,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:56,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410685540] [2021-06-05 21:09:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410685540] [2021-06-05 21:09:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410685540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434410419] [2021-06-05 21:09:56,278 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 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 21:09:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:09:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:56,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434410419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:56,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:56,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 21:09:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81744899] [2021-06-05 21:09:56,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:09:56,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:09:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:09:56,521 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:57,371 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-06-05 21:09:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:09:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:09:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:57,376 INFO L225 Difference]: With dead ends: 3901 [2021-06-05 21:09:57,376 INFO L226 Difference]: Without dead ends: 3868 [2021-06-05 21:09:57,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:09:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-06-05 21:09:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-06-05 21:09:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-06-05 21:09:57,446 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-06-05 21:09:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:57,446 INFO L482 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-06-05 21:09:57,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-06-05 21:09:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:09:57,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:57,452 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:57,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:09:57,665 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-06-05 21:09:57,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:57,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037125061] [2021-06-05 21:09:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:57,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037125061] [2021-06-05 21:09:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037125061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966624822] [2021-06-05 21:09:57,838 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 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 21:09:57,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:57,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:09:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:58,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966624822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:58,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:58,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:09:58,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728878069] [2021-06-05 21:09:58,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:09:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:09:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:09:58,063 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:58,922 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-06-05 21:09:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:09:58,922 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:09:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:58,926 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 21:09:58,926 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 21:09:58,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:09:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 21:09:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-06-05 21:09:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-06-05 21:09:58,978 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-06-05 21:09:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:58,978 INFO L482 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-06-05 21:09:58,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-06-05 21:09:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:09:58,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:58,983 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:59,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:59,195 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-06-05 21:09:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:59,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927963597] [2021-06-05 21:09:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:59,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:59,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927963597] [2021-06-05 21:09:59,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927963597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433812712] [2021-06-05 21:09:59,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:59,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:09:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:59,316 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 21:09:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433812712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:09:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274019472] [2021-06-05 21:09:59,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:09:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:09:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:09:59,317 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:59,436 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-06-05 21:09:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:09:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:09:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:59,440 INFO L225 Difference]: With dead ends: 4649 [2021-06-05 21:09:59,440 INFO L226 Difference]: Without dead ends: 4649 [2021-06-05 21:09:59,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-06-05 21:09:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-06-05 21:09:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-06-05 21:09:59,514 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-06-05 21:09:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:59,514 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-06-05 21:09:59,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-06-05 21:09:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:09:59,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:59,520 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:59,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:09:59,743 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:59,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-06-05 21:09:59,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:59,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135717742] [2021-06-05 21:09:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:59,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135717742] [2021-06-05 21:09:59,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135717742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293742476] [2021-06-05 21:09:59,786 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 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 21:09:59,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:09:59,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:09:59,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:59,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293742476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:59,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 21:09:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813222015] [2021-06-05 21:09:59,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:09:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:09:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:09:59,879 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:59,973 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-06-05 21:09:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:09:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:09:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:59,978 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 21:09:59,978 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 21:09:59,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 21:10:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-06-05 21:10:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-06-05 21:10:00,014 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-06-05 21:10:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:00,014 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-06-05 21:10:00,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-06-05 21:10:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:10:00,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:00,018 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:00,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:10:00,233 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-06-05 21:10:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:00,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408368975] [2021-06-05 21:10:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:00,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408368975] [2021-06-05 21:10:00,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408368975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731986817] [2021-06-05 21:10:00,280 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 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 21:10:00,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:10:00,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:00,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731986817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:00,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:00,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:10:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651196970] [2021-06-05 21:10:00,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:00,359 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:00,424 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-06-05 21:10:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:10:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:10:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:00,428 INFO L225 Difference]: With dead ends: 3755 [2021-06-05 21:10:00,428 INFO L226 Difference]: Without dead ends: 3743 [2021-06-05 21:10:00,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:10:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-06-05 21:10:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-06-05 21:10:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-06-05 21:10:00,477 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-06-05 21:10:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:00,477 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-06-05 21:10:00,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-06-05 21:10:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:10:00,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:00,481 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:00,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:00,705 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-06-05 21:10:00,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:00,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383679969] [2021-06-05 21:10:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:00,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:00,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383679969] [2021-06-05 21:10:00,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383679969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:00,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620954887] [2021-06-05 21:10:00,728 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 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 21:10:00,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:10:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:10:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:00,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620954887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:00,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:00,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:10:00,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709840301] [2021-06-05 21:10:00,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:10:00,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:00,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:10:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:10:00,792 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:00,838 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-06-05 21:10:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:10:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:10:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:00,842 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 21:10:00,842 INFO L226 Difference]: Without dead ends: 3731 [2021-06-05 21:10:00,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:10:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-06-05 21:10:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-06-05 21:10:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-06-05 21:10:00,883 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-06-05 21:10:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:00,883 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-06-05 21:10:00,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-06-05 21:10:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:10:00,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:00,887 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:01,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:01,101 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-06-05 21:10:01,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:01,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275550775] [2021-06-05 21:10:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:01,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275550775] [2021-06-05 21:10:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275550775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808817074] [2021-06-05 21:10:01,128 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 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 21:10:01,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:10:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:01,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:10:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:01,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808817074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:01,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:01,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:10:01,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710131155] [2021-06-05 21:10:01,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:10:01,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:10:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:10:01,186 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:01,259 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-06-05 21:10:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:10:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:10:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:01,263 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 21:10:01,263 INFO L226 Difference]: Without dead ends: 3808 [2021-06-05 21:10:01,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:10:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-06-05 21:10:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-06-05 21:10:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-06-05 21:10:01,304 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-06-05 21:10:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:01,304 INFO L482 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-06-05 21:10:01,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-06-05 21:10:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:10:01,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:01,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:01,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:10:01,507 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-06-05 21:10:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:01,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153495564] [2021-06-05 21:10:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:01,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:01,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153495564] [2021-06-05 21:10:01,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153495564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:01,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251631139] [2021-06-05 21:10:01,532 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 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 21:10:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:10:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:01,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251631139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:01,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:01,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:10:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501853066] [2021-06-05 21:10:01,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:10:01,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:10:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:10:01,612 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:01,671 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-06-05 21:10:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:10:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:10:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:01,676 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 21:10:01,676 INFO L226 Difference]: Without dead ends: 3973 [2021-06-05 21:10:01,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:10:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-06-05 21:10:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-06-05 21:10:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-06-05 21:10:01,731 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-06-05 21:10:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:01,731 INFO L482 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-06-05 21:10:01,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-06-05 21:10:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:10:01,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:01,736 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:01,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:01,953 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-06-05 21:10:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500680501] [2021-06-05 21:10:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:01,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:01,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500680501] [2021-06-05 21:10:01,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500680501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628989811] [2021-06-05 21:10:01,989 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 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 21:10:02,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:10:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628989811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:02,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:02,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:10:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519258903] [2021-06-05 21:10:02,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:02,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:02,064 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:02,143 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-06-05 21:10:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:10:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:10:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:02,148 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 21:10:02,149 INFO L226 Difference]: Without dead ends: 3967 [2021-06-05 21:10:02,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:10:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-06-05 21:10:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-06-05 21:10:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-06-05 21:10:02,203 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-06-05 21:10:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:02,203 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-06-05 21:10:02,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-06-05 21:10:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:10:02,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:02,207 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:02,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:10:02,413 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-06-05 21:10:02,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:02,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990241] [2021-06-05 21:10:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:02,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:02,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990241] [2021-06-05 21:10:02,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:02,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280025329] [2021-06-05 21:10:02,581 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 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 21:10:02,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:10:02,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:10:02,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:02,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280025329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:02,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:02,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:10:02,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983201332] [2021-06-05 21:10:02,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:02,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:02,875 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:03,991 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-06-05 21:10:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:10:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:10:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:03,998 INFO L225 Difference]: With dead ends: 4929 [2021-06-05 21:10:03,998 INFO L226 Difference]: Without dead ends: 4855 [2021-06-05 21:10:03,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 950.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:10:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-06-05 21:10:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-06-05 21:10:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-06-05 21:10:04,058 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-06-05 21:10:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:04,058 INFO L482 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-06-05 21:10:04,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-06-05 21:10:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:10:04,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:04,064 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:04,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:10:04,272 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-06-05 21:10:04,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:04,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297551723] [2021-06-05 21:10:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:04,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297551723] [2021-06-05 21:10:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297551723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469507665] [2021-06-05 21:10:04,455 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 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 21:10:04,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:10:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469507665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:04,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:04,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:10:04,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255277460] [2021-06-05 21:10:04,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:04,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:04,753 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:05,846 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-06-05 21:10:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:10:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:10:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:05,852 INFO L225 Difference]: With dead ends: 5234 [2021-06-05 21:10:05,852 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 21:10:05,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:10:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 21:10:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-06-05 21:10:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-06-05 21:10:05,901 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-06-05 21:10:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:05,901 INFO L482 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-06-05 21:10:05,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-06-05 21:10:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:10:05,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:05,906 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:06,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:10:06,107 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-06-05 21:10:06,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:06,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742270053] [2021-06-05 21:10:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:06,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742270053] [2021-06-05 21:10:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742270053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361432212] [2021-06-05 21:10:06,366 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 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 21:10:06,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:10:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:10:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:06,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361432212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:06,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:06,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:10:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553226068] [2021-06-05 21:10:06,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:06,704 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:07,852 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-06-05 21:10:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:10:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:10:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:07,858 INFO L225 Difference]: With dead ends: 5435 [2021-06-05 21:10:07,858 INFO L226 Difference]: Without dead ends: 5402 [2021-06-05 21:10:07,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:10:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-06-05 21:10:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-06-05 21:10:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-06-05 21:10:07,940 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-06-05 21:10:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:07,941 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-06-05 21:10:07,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-06-05 21:10:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:10:07,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:07,945 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:10:08,162 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-06-05 21:10:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800808571] [2021-06-05 21:10:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:08,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:08,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800808571] [2021-06-05 21:10:08,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800808571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:08,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765327326] [2021-06-05 21:10:08,340 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 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 21:10:08,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:10:08,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:10:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765327326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:08,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:08,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 21:10:08,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697728322] [2021-06-05 21:10:08,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:08,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:08,626 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:09,612 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-06-05 21:10:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:10:09,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:10:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:09,618 INFO L225 Difference]: With dead ends: 5530 [2021-06-05 21:10:09,618 INFO L226 Difference]: Without dead ends: 5486 [2021-06-05 21:10:09,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:10:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-05 21:10:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-06-05 21:10:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-06-05 21:10:09,686 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-06-05 21:10:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:09,687 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-06-05 21:10:09,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-06-05 21:10:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:09,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:09,690 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:09,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:10:09,891 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-06-05 21:10:09,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:09,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746717590] [2021-06-05 21:10:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:10,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:10,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746717590] [2021-06-05 21:10:10,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746717590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:10,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099641061] [2021-06-05 21:10:10,042 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 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 21:10:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:10,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099641061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:10,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:10,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 21:10:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028913509] [2021-06-05 21:10:10,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:10,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:10,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:10,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:10,232 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:10,575 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-06-05 21:10:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:10,581 INFO L225 Difference]: With dead ends: 5662 [2021-06-05 21:10:10,581 INFO L226 Difference]: Without dead ends: 5648 [2021-06-05 21:10:10,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-06-05 21:10:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-06-05 21:10:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-06-05 21:10:10,635 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-06-05 21:10:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:10,635 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-06-05 21:10:10,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-06-05 21:10:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:10,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:10,638 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:10,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:10:10,839 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-06-05 21:10:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:10,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159912547] [2021-06-05 21:10:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:11,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:11,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159912547] [2021-06-05 21:10:11,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159912547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:11,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044414206] [2021-06-05 21:10:11,021 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:11,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:11,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044414206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:11,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:11,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 21:10:11,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953841447] [2021-06-05 21:10:11,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:11,271 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:11,733 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-06-05 21:10:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:10:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:11,740 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 21:10:11,740 INFO L226 Difference]: Without dead ends: 5793 [2021-06-05 21:10:11,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-06-05 21:10:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-06-05 21:10:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-06-05 21:10:11,836 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-06-05 21:10:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:11,836 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-06-05 21:10:11,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-06-05 21:10:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:11,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:11,839 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:12,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:10:12,040 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-06-05 21:10:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:12,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159662728] [2021-06-05 21:10:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:12,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159662728] [2021-06-05 21:10:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159662728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660987336] [2021-06-05 21:10:12,164 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 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 21:10:12,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:10:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:12,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:12,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660987336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:12,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:12,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:12,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533485099] [2021-06-05 21:10:12,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:12,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:12,393 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:12,958 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-06-05 21:10:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:12,965 INFO L225 Difference]: With dead ends: 6674 [2021-06-05 21:10:12,965 INFO L226 Difference]: Without dead ends: 6644 [2021-06-05 21:10:12,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-06-05 21:10:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-06-05 21:10:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-06-05 21:10:13,056 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-06-05 21:10:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:13,056 INFO L482 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-06-05 21:10:13,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-06-05 21:10:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:13,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:13,060 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:13,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:13,265 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-06-05 21:10:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:13,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329270468] [2021-06-05 21:10:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:13,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329270468] [2021-06-05 21:10:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329270468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957321770] [2021-06-05 21:10:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:13,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:13,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:13,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957321770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:13,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:13,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:13,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293377683] [2021-06-05 21:10:13,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:13,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:13,662 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:13,988 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-06-05 21:10:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:10:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:13,996 INFO L225 Difference]: With dead ends: 7466 [2021-06-05 21:10:13,996 INFO L226 Difference]: Without dead ends: 7426 [2021-06-05 21:10:13,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-05 21:10:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-06-05 21:10:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-06-05 21:10:14,091 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-06-05 21:10:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:14,092 INFO L482 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-06-05 21:10:14,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-06-05 21:10:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:14,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:14,096 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:14,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:14,297 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-06-05 21:10:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:14,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131676368] [2021-06-05 21:10:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:14,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131676368] [2021-06-05 21:10:14,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131676368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597707039] [2021-06-05 21:10:14,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:14,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:10:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597707039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:14,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:14,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 21:10:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401541580] [2021-06-05 21:10:14,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:14,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:14,664 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:15,082 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-06-05 21:10:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:10:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:15,092 INFO L225 Difference]: With dead ends: 7186 [2021-06-05 21:10:15,092 INFO L226 Difference]: Without dead ends: 7172 [2021-06-05 21:10:15,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-06-05 21:10:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-06-05 21:10:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-06-05 21:10:15,223 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-06-05 21:10:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:15,223 INFO L482 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-06-05 21:10:15,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-06-05 21:10:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:15,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:15,230 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:15,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:15,434 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-06-05 21:10:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071220058] [2021-06-05 21:10:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:15,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:15,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071220058] [2021-06-05 21:10:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071220058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:15,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219322225] [2021-06-05 21:10:15,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:15,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:10:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:15,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219322225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:15,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:15,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:15,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533411992] [2021-06-05 21:10:15,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:15,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:15,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:15,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:15,806 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:16,150 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-06-05 21:10:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:10:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:16,158 INFO L225 Difference]: With dead ends: 8381 [2021-06-05 21:10:16,159 INFO L226 Difference]: Without dead ends: 8341 [2021-06-05 21:10:16,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:10:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-06-05 21:10:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-06-05 21:10:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-06-05 21:10:16,252 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-06-05 21:10:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:16,252 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-06-05 21:10:16,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-06-05 21:10:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:16,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:16,257 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:16,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 21:10:16,458 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:16,459 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-06-05 21:10:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:16,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902705787] [2021-06-05 21:10:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:16,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:16,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902705787] [2021-06-05 21:10:16,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902705787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:16,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212216152] [2021-06-05 21:10:16,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:10:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:16,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212216152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:16,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:16,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 21:10:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599532853] [2021-06-05 21:10:16,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:16,769 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:17,338 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-06-05 21:10:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:17,346 INFO L225 Difference]: With dead ends: 9510 [2021-06-05 21:10:17,346 INFO L226 Difference]: Without dead ends: 9476 [2021-06-05 21:10:17,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-06-05 21:10:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-06-05 21:10:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-06-05 21:10:17,442 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-06-05 21:10:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:17,442 INFO L482 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-06-05 21:10:17,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 21:10:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-06-05 21:10:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:17,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:17,448 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:17,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:17,649 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-06-05 21:10:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:17,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868984582] [2021-06-05 21:10:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:17,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868984582] [2021-06-05 21:10:17,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868984582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981158685] [2021-06-05 21:10:17,762 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 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 21:10:17,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:17,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:17,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981158685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:17,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:17,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:17,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027993099] [2021-06-05 21:10:17,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:17,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:17,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:17,965 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:18,411 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-06-05 21:10:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:10:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:18,421 INFO L225 Difference]: With dead ends: 9488 [2021-06-05 21:10:18,422 INFO L226 Difference]: Without dead ends: 9449 [2021-06-05 21:10:18,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-06-05 21:10:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-06-05 21:10:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-06-05 21:10:18,519 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-06-05 21:10:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:18,519 INFO L482 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-06-05 21:10:18,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-06-05 21:10:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:18,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:18,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:18,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:18,738 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-06-05 21:10:18,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:18,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243650661] [2021-06-05 21:10:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:18,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243650661] [2021-06-05 21:10:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243650661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:18,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054093390] [2021-06-05 21:10:18,849 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 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 21:10:18,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:10:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:19,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054093390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:19,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:19,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:19,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833574375] [2021-06-05 21:10:19,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:19,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:19,083 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:19,614 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-06-05 21:10:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:10:19,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:19,627 INFO L225 Difference]: With dead ends: 11530 [2021-06-05 21:10:19,627 INFO L226 Difference]: Without dead ends: 11490 [2021-06-05 21:10:19,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-06-05 21:10:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-06-05 21:10:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-06-05 21:10:19,739 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-06-05 21:10:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:19,739 INFO L482 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-06-05 21:10:19,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-06-05 21:10:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:19,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:19,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:19,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:10:19,969 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-06-05 21:10:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:19,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789177244] [2021-06-05 21:10:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789177244] [2021-06-05 21:10:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789177244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53801296] [2021-06-05 21:10:20,075 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:20,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:20,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53801296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:20,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:20,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 21:10:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234558040] [2021-06-05 21:10:20,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:20,288 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:20,596 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-06-05 21:10:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:10:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:20,606 INFO L225 Difference]: With dead ends: 10586 [2021-06-05 21:10:20,606 INFO L226 Difference]: Without dead ends: 10559 [2021-06-05 21:10:20,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-06-05 21:10:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-06-05 21:10:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-06-05 21:10:20,718 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-06-05 21:10:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:20,718 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-06-05 21:10:20,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-06-05 21:10:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:20,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:20,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:20,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 21:10:20,970 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-06-05 21:10:20,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:20,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075775848] [2021-06-05 21:10:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:21,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:21,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075775848] [2021-06-05 21:10:21,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075775848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:21,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127686522] [2021-06-05 21:10:21,199 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 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 21:10:21,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:10:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:21,406 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 21:10:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127686522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:21,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:21,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 21:10:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324074670] [2021-06-05 21:10:21,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:21,407 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:21,746 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-06-05 21:10:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:21,759 INFO L225 Difference]: With dead ends: 11077 [2021-06-05 21:10:21,759 INFO L226 Difference]: Without dead ends: 11043 [2021-06-05 21:10:21,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-06-05 21:10:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-06-05 21:10:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-06-05 21:10:21,891 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-06-05 21:10:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-06-05 21:10:21,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-06-05 21:10:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:10:21,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:21,900 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:10:22,100 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-06-05 21:10:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:22,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553210865] [2021-06-05 21:10:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:22,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:22,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553210865] [2021-06-05 21:10:22,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553210865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:22,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653730727] [2021-06-05 21:10:22,215 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 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 21:10:22,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:10:22,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:22,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653730727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:22,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:22,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 21:10:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006345960] [2021-06-05 21:10:22,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:22,426 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:22,797 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-06-05 21:10:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:10:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:10:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:22,810 INFO L225 Difference]: With dead ends: 11359 [2021-06-05 21:10:22,811 INFO L226 Difference]: Without dead ends: 11319 [2021-06-05 21:10:22,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:10:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-06-05 21:10:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-06-05 21:10:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-06-05 21:10:22,996 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-06-05 21:10:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:22,996 INFO L482 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-06-05 21:10:22,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-06-05 21:10:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:10:23,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:23,004 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:23,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:23,205 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-06-05 21:10:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:23,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632286454] [2021-06-05 21:10:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:10:23,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632286454] [2021-06-05 21:10:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632286454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120237587] [2021-06-05 21:10:23,308 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) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:23,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:10:23,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:10:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 21:10:23,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120237587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:23,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:23,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:10:23,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046203447] [2021-06-05 21:10:23,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:10:23,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:10:23,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:23,470 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:23,772 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-06-05 21:10:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:10:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:10:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:23,789 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 21:10:23,789 INFO L226 Difference]: Without dead ends: 10480 [2021-06-05 21:10:23,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:10:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-06-05 21:10:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-06-05 21:10:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-06-05 21:10:23,968 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-06-05 21:10:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:23,969 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-06-05 21:10:23,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-06-05 21:10:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:23,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:23,979 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:24,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:24,179 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-06-05 21:10:24,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:24,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889978964] [2021-06-05 21:10:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:24,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:24,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889978964] [2021-06-05 21:10:24,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889978964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:24,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452553029] [2021-06-05 21:10:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:10:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452553029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:24,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:24,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 21:10:24,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20876866] [2021-06-05 21:10:24,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:10:24,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:10:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:24,322 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:24,497 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-06-05 21:10:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:10:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:24,512 INFO L225 Difference]: With dead ends: 13175 [2021-06-05 21:10:24,512 INFO L226 Difference]: Without dead ends: 13175 [2021-06-05 21:10:24,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:10:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-06-05 21:10:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-06-05 21:10:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-06-05 21:10:24,650 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-06-05 21:10:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:24,650 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-06-05 21:10:24,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-06-05 21:10:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:24,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:24,658 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:24,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:24,859 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-06-05 21:10:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:24,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328868671] [2021-06-05 21:10:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:24,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328868671] [2021-06-05 21:10:24,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328868671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321016123] [2021-06-05 21:10:24,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:24,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:24,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:10:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321016123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:25,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:25,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 21:10:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11637859] [2021-06-05 21:10:25,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:10:25,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:25,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:10:25,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:25,062 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:25,193 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-06-05 21:10:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:10:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:25,202 INFO L225 Difference]: With dead ends: 9582 [2021-06-05 21:10:25,202 INFO L226 Difference]: Without dead ends: 9546 [2021-06-05 21:10:25,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:10:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-06-05 21:10:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-06-05 21:10:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-06-05 21:10:25,308 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-06-05 21:10:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:25,308 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-06-05 21:10:25,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-06-05 21:10:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:25,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:25,316 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:25,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:25,525 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-06-05 21:10:25,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:25,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696902540] [2021-06-05 21:10:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:25,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696902540] [2021-06-05 21:10:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696902540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901695457] [2021-06-05 21:10:25,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:25,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:10:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:25,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901695457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:25,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:25,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:10:25,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878432509] [2021-06-05 21:10:25,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:25,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:25,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:25,633 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 21:10:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:25,704 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-06-05 21:10:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:10:25,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:25,712 INFO L225 Difference]: With dead ends: 9119 [2021-06-05 21:10:25,712 INFO L226 Difference]: Without dead ends: 9116 [2021-06-05 21:10:25,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:10:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-06-05 21:10:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-06-05 21:10:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-06-05 21:10:25,803 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-06-05 21:10:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:25,803 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-06-05 21:10:25,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 21:10:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-06-05 21:10:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:25,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:25,809 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:26,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 21:10:26,010 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:26,010 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-06-05 21:10:26,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:26,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949082337] [2021-06-05 21:10:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:26,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:26,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949082337] [2021-06-05 21:10:26,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949082337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497024622] [2021-06-05 21:10:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:26,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:10:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497024622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:10:26,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072798192] [2021-06-05 21:10:26,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:26,120 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:26,217 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-06-05 21:10:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:26,233 INFO L225 Difference]: With dead ends: 11397 [2021-06-05 21:10:26,234 INFO L226 Difference]: Without dead ends: 11397 [2021-06-05 21:10:26,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:10:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-06-05 21:10:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-06-05 21:10:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-06-05 21:10:26,401 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-06-05 21:10:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:26,401 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-06-05 21:10:26,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-06-05 21:10:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:26,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:26,410 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:26,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:26,623 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-06-05 21:10:26,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:26,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269779015] [2021-06-05 21:10:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269779015] [2021-06-05 21:10:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269779015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787656273] [2021-06-05 21:10:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:26,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:10:26,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:26,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787656273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:26,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:10:26,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508889079] [2021-06-05 21:10:26,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:26,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:26,727 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:26,809 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-06-05 21:10:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:10:26,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:26,819 INFO L225 Difference]: With dead ends: 11244 [2021-06-05 21:10:26,819 INFO L226 Difference]: Without dead ends: 11238 [2021-06-05 21:10:26,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:10:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-06-05 21:10:26,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-06-05 21:10:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-06-05 21:10:26,950 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-06-05 21:10:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:26,950 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-06-05 21:10:26,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-06-05 21:10:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:26,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:26,957 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 21:10:27,157 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-06-05 21:10:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505101716] [2021-06-05 21:10:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:27,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505101716] [2021-06-05 21:10:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505101716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858501937] [2021-06-05 21:10:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:27,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:10:27,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:27,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:27,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858501937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:27,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:27,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:10:27,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951737643] [2021-06-05 21:10:27,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:10:27,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:27,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:10:27,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:10:27,263 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:27,358 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-06-05 21:10:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:27,367 INFO L225 Difference]: With dead ends: 9906 [2021-06-05 21:10:27,367 INFO L226 Difference]: Without dead ends: 9894 [2021-06-05 21:10:27,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-06-05 21:10:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-06-05 21:10:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-06-05 21:10:27,465 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-06-05 21:10:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:27,466 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-06-05 21:10:27,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-06-05 21:10:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:27,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:27,472 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:27,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:10:27,673 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-06-05 21:10:27,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348629966] [2021-06-05 21:10:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:27,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:27,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348629966] [2021-06-05 21:10:27,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348629966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:27,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176380980] [2021-06-05 21:10:27,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:10:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176380980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:27,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:27,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:10:27,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138088564] [2021-06-05 21:10:27,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:10:27,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:10:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:10:27,915 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:28,018 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-06-05 21:10:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:28,027 INFO L225 Difference]: With dead ends: 10139 [2021-06-05 21:10:28,028 INFO L226 Difference]: Without dead ends: 10139 [2021-06-05 21:10:28,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-06-05 21:10:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-06-05 21:10:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-06-05 21:10:28,126 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-06-05 21:10:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:28,126 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-06-05 21:10:28,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-06-05 21:10:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:28,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:28,132 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:28,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:28,333 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-06-05 21:10:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:28,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227811704] [2021-06-05 21:10:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:28,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227811704] [2021-06-05 21:10:28,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227811704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977986135] [2021-06-05 21:10:28,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:10:28,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:28,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:28,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977986135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:28,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:28,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:10:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88586034] [2021-06-05 21:10:28,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:28,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:28,455 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:28,557 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-06-05 21:10:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:28,572 INFO L225 Difference]: With dead ends: 11101 [2021-06-05 21:10:28,573 INFO L226 Difference]: Without dead ends: 11101 [2021-06-05 21:10:28,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:10:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-06-05 21:10:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-06-05 21:10:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-06-05 21:10:28,756 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-06-05 21:10:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:28,756 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-06-05 21:10:28,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-06-05 21:10:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:28,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:28,764 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:28,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:10:28,978 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-06-05 21:10:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221754009] [2021-06-05 21:10:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:29,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:29,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221754009] [2021-06-05 21:10:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221754009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929859370] [2021-06-05 21:10:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:29,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:10:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929859370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:29,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:29,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:10:29,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921009221] [2021-06-05 21:10:29,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:10:29,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:10:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:10:29,083 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:29,157 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-06-05 21:10:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:10:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:29,168 INFO L225 Difference]: With dead ends: 11074 [2021-06-05 21:10:29,168 INFO L226 Difference]: Without dead ends: 11071 [2021-06-05 21:10:29,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:10:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-06-05 21:10:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-06-05 21:10:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-06-05 21:10:29,279 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-06-05 21:10:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:29,279 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-06-05 21:10:29,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-06-05 21:10:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:29,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:29,286 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:29,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:29,486 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-06-05 21:10:29,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:29,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094088848] [2021-06-05 21:10:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:29,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:29,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094088848] [2021-06-05 21:10:29,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094088848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:29,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084551429] [2021-06-05 21:10:29,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:29,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084551429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:29,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:29,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:10:29,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675756015] [2021-06-05 21:10:29,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:10:29,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:10:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:10:29,617 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:29,706 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-06-05 21:10:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:29,718 INFO L225 Difference]: With dead ends: 11098 [2021-06-05 21:10:29,718 INFO L226 Difference]: Without dead ends: 11086 [2021-06-05 21:10:29,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-06-05 21:10:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-06-05 21:10:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-06-05 21:10:29,842 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-06-05 21:10:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:29,842 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-06-05 21:10:29,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-06-05 21:10:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:10:29,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:29,849 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:30,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 21:10:30,050 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-06-05 21:10:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120196728] [2021-06-05 21:10:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:30,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:30,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120196728] [2021-06-05 21:10:30,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120196728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724263474] [2021-06-05 21:10:30,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:30,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:10:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:10:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:30,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724263474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:30,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:10:30,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338079335] [2021-06-05 21:10:30,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:10:30,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:30,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:10:30,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:10:30,185 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:30,302 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-06-05 21:10:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:10:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:10:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:30,312 INFO L225 Difference]: With dead ends: 11062 [2021-06-05 21:10:30,313 INFO L226 Difference]: Without dead ends: 11039 [2021-06-05 21:10:30,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-06-05 21:10:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-06-05 21:10:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-06-05 21:10:30,437 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-06-05 21:10:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:30,437 INFO L482 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-06-05 21:10:30,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-06-05 21:10:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 21:10:30,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:30,444 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:30,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:30,645 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-06-05 21:10:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:30,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353899166] [2021-06-05 21:10:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:30,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:30,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353899166] [2021-06-05 21:10:30,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353899166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529353927] [2021-06-05 21:10:30,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:10:30,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:10:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:10:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:30,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529353927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:30,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:10:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408399643] [2021-06-05 21:10:30,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:10:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:10:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:10:30,874 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:31,024 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-06-05 21:10:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:10:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 21:10:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:31,035 INFO L225 Difference]: With dead ends: 11977 [2021-06-05 21:10:31,035 INFO L226 Difference]: Without dead ends: 11977 [2021-06-05 21:10:31,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-06-05 21:10:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-06-05 21:10:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-06-05 21:10:31,182 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-06-05 21:10:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:31,182 INFO L482 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-06-05 21:10:31,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-06-05 21:10:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:31,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:31,190 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:31,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 21:10:31,391 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-06-05 21:10:31,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:31,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725326093] [2021-06-05 21:10:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:31,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:31,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725326093] [2021-06-05 21:10:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725326093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:31,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125112178] [2021-06-05 21:10:31,549 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 21:10:31,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:10:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:31,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125112178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:31,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:31,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:31,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144657977] [2021-06-05 21:10:31,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:31,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:31,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:31,822 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:32,450 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-06-05 21:10:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:32,464 INFO L225 Difference]: With dead ends: 11896 [2021-06-05 21:10:32,464 INFO L226 Difference]: Without dead ends: 11879 [2021-06-05 21:10:32,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:10:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-06-05 21:10:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-06-05 21:10:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-06-05 21:10:32,604 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-06-05 21:10:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:32,604 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-06-05 21:10:32,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-06-05 21:10:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:32,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:32,614 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:32,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:32,814 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-06-05 21:10:32,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:32,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846660456] [2021-06-05 21:10:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:32,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:32,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846660456] [2021-06-05 21:10:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846660456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349856387] [2021-06-05 21:10:32,989 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 21:10:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:33,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349856387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:33,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:33,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:33,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176280921] [2021-06-05 21:10:33,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:33,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:33,278 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:33,851 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-06-05 21:10:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:33,866 INFO L225 Difference]: With dead ends: 12194 [2021-06-05 21:10:33,866 INFO L226 Difference]: Without dead ends: 12177 [2021-06-05 21:10:33,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-06-05 21:10:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-06-05 21:10:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-06-05 21:10:34,016 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-06-05 21:10:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:34,016 INFO L482 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-06-05 21:10:34,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-06-05 21:10:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:34,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:34,028 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:34,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 21:10:34,254 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-06-05 21:10:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:34,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55609861] [2021-06-05 21:10:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:34,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55609861] [2021-06-05 21:10:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55609861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633201098] [2021-06-05 21:10:34,417 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 21:10:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:34,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:34,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633201098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:34,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:34,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:34,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809939883] [2021-06-05 21:10:34,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:34,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:34,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:34,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:34,693 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:35,460 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-06-05 21:10:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:35,478 INFO L225 Difference]: With dead ends: 12640 [2021-06-05 21:10:35,479 INFO L226 Difference]: Without dead ends: 12623 [2021-06-05 21:10:35,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:10:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-06-05 21:10:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-06-05 21:10:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-06-05 21:10:35,654 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-06-05 21:10:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:35,655 INFO L482 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-06-05 21:10:35,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-06-05 21:10:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:35,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:35,664 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:35,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:35,869 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-06-05 21:10:35,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:35,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762945615] [2021-06-05 21:10:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:36,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762945615] [2021-06-05 21:10:36,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762945615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698589060] [2021-06-05 21:10:36,059 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 21:10:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:10:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:36,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698589060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:36,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:36,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:10:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865804265] [2021-06-05 21:10:36,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:10:36,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:36,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:10:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:36,449 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:37,477 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-06-05 21:10:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:10:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:37,495 INFO L225 Difference]: With dead ends: 15043 [2021-06-05 21:10:37,496 INFO L226 Difference]: Without dead ends: 15009 [2021-06-05 21:10:37,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:10:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-06-05 21:10:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-06-05 21:10:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-06-05 21:10:37,661 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-06-05 21:10:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-06-05 21:10:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-06-05 21:10:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:37,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:37,671 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:37,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:10:37,893 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-06-05 21:10:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:37,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255000851] [2021-06-05 21:10:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:38,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255000851] [2021-06-05 21:10:38,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255000851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402894193] [2021-06-05 21:10:38,099 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 21:10:38,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:38,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402894193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:38,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:38,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:10:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845435549] [2021-06-05 21:10:38,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:38,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:38,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:38,393 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:39,002 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-06-05 21:10:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:10:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:39,017 INFO L225 Difference]: With dead ends: 14047 [2021-06-05 21:10:39,017 INFO L226 Difference]: Without dead ends: 14013 [2021-06-05 21:10:39,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-06-05 21:10:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-06-05 21:10:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-06-05 21:10:39,178 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-06-05 21:10:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:39,178 INFO L482 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-06-05 21:10:39,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-06-05 21:10:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:39,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:39,187 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:39,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 21:10:39,388 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-06-05 21:10:39,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:39,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889175645] [2021-06-05 21:10:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:39,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889175645] [2021-06-05 21:10:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889175645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314238843] [2021-06-05 21:10:39,542 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 21:10:39,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:10:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:39,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:39,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314238843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:39,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:39,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:10:39,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580912298] [2021-06-05 21:10:39,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:10:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:10:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:39,872 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:40,544 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-06-05 21:10:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:10:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:40,563 INFO L225 Difference]: With dead ends: 16913 [2021-06-05 21:10:40,564 INFO L226 Difference]: Without dead ends: 16870 [2021-06-05 21:10:40,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:10:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-06-05 21:10:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-06-05 21:10:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-06-05 21:10:40,741 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-06-05 21:10:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:40,741 INFO L482 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-06-05 21:10:40,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-06-05 21:10:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:40,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:40,751 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:40,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 21:10:40,961 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-06-05 21:10:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:40,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299614283] [2021-06-05 21:10:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:41,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299614283] [2021-06-05 21:10:41,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299614283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847023685] [2021-06-05 21:10:41,127 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 21:10:41,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:10:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847023685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:41,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44180338] [2021-06-05 21:10:41,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:41,546 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:42,266 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-06-05 21:10:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:42,285 INFO L225 Difference]: With dead ends: 16313 [2021-06-05 21:10:42,286 INFO L226 Difference]: Without dead ends: 16296 [2021-06-05 21:10:42,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 708.4ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:10:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-05 21:10:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-06-05 21:10:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-06-05 21:10:42,519 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-06-05 21:10:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:42,519 INFO L482 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-06-05 21:10:42,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-06-05 21:10:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:42,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:42,529 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:42,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:42,734 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-06-05 21:10:42,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:42,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118974046] [2021-06-05 21:10:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:42,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118974046] [2021-06-05 21:10:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118974046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892289799] [2021-06-05 21:10:42,905 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 21:10:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:43,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892289799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:43,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:43,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:43,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409996989] [2021-06-05 21:10:43,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:43,157 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:43,779 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-06-05 21:10:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:43,799 INFO L225 Difference]: With dead ends: 16694 [2021-06-05 21:10:43,799 INFO L226 Difference]: Without dead ends: 16677 [2021-06-05 21:10:43,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-06-05 21:10:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-06-05 21:10:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-06-05 21:10:43,995 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-06-05 21:10:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:43,995 INFO L482 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-06-05 21:10:43,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-06-05 21:10:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:44,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:44,005 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:44,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:44,205 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-06-05 21:10:44,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:44,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081093597] [2021-06-05 21:10:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:44,386 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 21:10:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:44,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:44,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081093597] [2021-06-05 21:10:44,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081093597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:44,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95388587] [2021-06-05 21:10:44,507 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 21:10:44,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:44,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:44,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95388587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:44,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:44,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:44,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615837394] [2021-06-05 21:10:44,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:44,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:44,792 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:45,428 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-06-05 21:10:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:45,447 INFO L225 Difference]: With dead ends: 16910 [2021-06-05 21:10:45,447 INFO L226 Difference]: Without dead ends: 16893 [2021-06-05 21:10:45,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-06-05 21:10:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-06-05 21:10:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-06-05 21:10:45,630 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-06-05 21:10:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:45,630 INFO L482 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-06-05 21:10:45,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-06-05 21:10:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:45,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:45,640 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:45,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:45,840 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:45,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-06-05 21:10:45,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:45,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043996825] [2021-06-05 21:10:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:45,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:45,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043996825] [2021-06-05 21:10:45,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043996825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266606791] [2021-06-05 21:10:45,990 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 21:10:46,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:10:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:46,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266606791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:46,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:46,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:10:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395211457] [2021-06-05 21:10:46,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 21:10:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 21:10:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:10:46,372 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:47,454 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-06-05 21:10:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:10:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:47,472 INFO L225 Difference]: With dead ends: 18935 [2021-06-05 21:10:47,472 INFO L226 Difference]: Without dead ends: 18918 [2021-06-05 21:10:47,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:10:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-06-05 21:10:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-06-05 21:10:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-06-05 21:10:47,661 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-06-05 21:10:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:47,661 INFO L482 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-06-05 21:10:47,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-06-05 21:10:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:47,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:47,671 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:47,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 21:10:47,873 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-06-05 21:10:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:47,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463287091] [2021-06-05 21:10:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:48,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463287091] [2021-06-05 21:10:48,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463287091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418093322] [2021-06-05 21:10:48,010 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 21:10:48,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:48,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418093322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:48,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:48,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:10:48,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235987846] [2021-06-05 21:10:48,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:48,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:48,280 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:48,821 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-06-05 21:10:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:48,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:48,841 INFO L225 Difference]: With dead ends: 17863 [2021-06-05 21:10:48,842 INFO L226 Difference]: Without dead ends: 17829 [2021-06-05 21:10:48,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:10:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-06-05 21:10:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-06-05 21:10:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-06-05 21:10:49,052 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-06-05 21:10:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:49,053 INFO L482 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-06-05 21:10:49,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-06-05 21:10:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:49,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:49,063 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:49,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:49,263 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-06-05 21:10:49,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:49,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953022436] [2021-06-05 21:10:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:49,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:49,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953022436] [2021-06-05 21:10:49,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953022436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:49,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554466202] [2021-06-05 21:10:49,416 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 21:10:49,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:10:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:49,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554466202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:49,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:49,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:10:49,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118738393] [2021-06-05 21:10:49,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:10:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:10:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:49,693 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:50,353 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-06-05 21:10:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:10:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:50,374 INFO L225 Difference]: With dead ends: 20211 [2021-06-05 21:10:50,374 INFO L226 Difference]: Without dead ends: 20168 [2021-06-05 21:10:50,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:10:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-06-05 21:10:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-06-05 21:10:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-06-05 21:10:50,597 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-06-05 21:10:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:50,597 INFO L482 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-06-05 21:10:50,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-06-05 21:10:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:50,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:50,608 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:50,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:50,808 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-06-05 21:10:50,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:50,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654124504] [2021-06-05 21:10:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:50,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654124504] [2021-06-05 21:10:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654124504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034964054] [2021-06-05 21:10:50,970 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 21:10:50,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:10:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:51,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034964054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:51,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:51,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:51,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746265170] [2021-06-05 21:10:51,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:51,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:51,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:51,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:51,231 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:51,807 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-06-05 21:10:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:51,830 INFO L225 Difference]: With dead ends: 19446 [2021-06-05 21:10:51,830 INFO L226 Difference]: Without dead ends: 19429 [2021-06-05 21:10:51,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:10:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-06-05 21:10:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-06-05 21:10:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-06-05 21:10:52,065 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-06-05 21:10:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:52,065 INFO L482 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-06-05 21:10:52,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-06-05 21:10:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:52,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:52,076 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:52,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:52,276 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-06-05 21:10:52,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:52,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075905046] [2021-06-05 21:10:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:52,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:52,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075905046] [2021-06-05 21:10:52,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075905046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:52,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774290914] [2021-06-05 21:10:52,443 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 21:10:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774290914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:52,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:52,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:52,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844030996] [2021-06-05 21:10:52,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:52,832 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:53,425 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-06-05 21:10:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:53,448 INFO L225 Difference]: With dead ends: 19790 [2021-06-05 21:10:53,448 INFO L226 Difference]: Without dead ends: 19773 [2021-06-05 21:10:53,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-06-05 21:10:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-06-05 21:10:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-06-05 21:10:53,717 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-06-05 21:10:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:53,717 INFO L482 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-06-05 21:10:53,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-06-05 21:10:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:53,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:53,728 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 21:10:53,929 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-06-05 21:10:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231905655] [2021-06-05 21:10:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:54,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231905655] [2021-06-05 21:10:54,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231905655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285858602] [2021-06-05 21:10:54,078 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 21:10:54,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:54,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:54,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285858602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:54,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:54,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431167745] [2021-06-05 21:10:54,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:54,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:54,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:54,341 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:54,919 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-06-05 21:10:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:10:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:54,943 INFO L225 Difference]: With dead ends: 20173 [2021-06-05 21:10:54,943 INFO L226 Difference]: Without dead ends: 20156 [2021-06-05 21:10:54,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-06-05 21:10:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-06-05 21:10:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-06-05 21:10:55,197 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-06-05 21:10:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:55,197 INFO L482 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-06-05 21:10:55,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-06-05 21:10:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:55,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:55,213 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:55,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:55,416 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-06-05 21:10:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:55,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707287073] [2021-06-05 21:10:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:55,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707287073] [2021-06-05 21:10:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707287073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797525327] [2021-06-05 21:10:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:10:55,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:10:55,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:55,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797525327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:55,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:55,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:10:55,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010070525] [2021-06-05 21:10:55,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:10:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:10:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:55,803 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:56,570 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-06-05 21:10:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:10:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:56,593 INFO L225 Difference]: With dead ends: 20811 [2021-06-05 21:10:56,593 INFO L226 Difference]: Without dead ends: 20777 [2021-06-05 21:10:56,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:10:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-06-05 21:10:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-06-05 21:10:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-06-05 21:10:56,823 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-06-05 21:10:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:56,823 INFO L482 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-06-05 21:10:56,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-06-05 21:10:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:56,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:56,834 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:57,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:57,034 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-06-05 21:10:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:57,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79885530] [2021-06-05 21:10:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79885530] [2021-06-05 21:10:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79885530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069729004] [2021-06-05 21:10:57,172 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 21:10:57,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:57,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069729004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:57,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:57,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:10:57,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153396419] [2021-06-05 21:10:57,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:10:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:57,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:10:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:57,498 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:58,242 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-06-05 21:10:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:58,268 INFO L225 Difference]: With dead ends: 23109 [2021-06-05 21:10:58,268 INFO L226 Difference]: Without dead ends: 23066 [2021-06-05 21:10:58,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:10:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-06-05 21:10:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-06-05 21:10:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-06-05 21:10:58,544 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-06-05 21:10:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:58,545 INFO L482 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-06-05 21:10:58,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-06-05 21:10:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:10:58,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:58,557 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 21:10:58,758 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-06-05 21:10:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:58,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30590798] [2021-06-05 21:10:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:58,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:58,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30590798] [2021-06-05 21:10:58,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30590798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:58,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646481391] [2021-06-05 21:10:58,898 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 21:10:58,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:10:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:58,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:10:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:59,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646481391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:59,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:59,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:10:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560789133] [2021-06-05 21:10:59,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:59,258 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:59,947 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-06-05 21:10:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:10:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:10:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:59,972 INFO L225 Difference]: With dead ends: 23617 [2021-06-05 21:10:59,972 INFO L226 Difference]: Without dead ends: 23583 [2021-06-05 21:10:59,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:10:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-06-05 21:11:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-06-05 21:11:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-06-05 21:11:00,230 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-06-05 21:11:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-06-05 21:11:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-06-05 21:11:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:00,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:00,244 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:00,444 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-06-05 21:11:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046466906] [2021-06-05 21:11:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:00,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046466906] [2021-06-05 21:11:00,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046466906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255798804] [2021-06-05 21:11:00,588 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 21:11:00,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:11:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:00,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255798804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:00,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:00,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832501720] [2021-06-05 21:11:00,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:00,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:00,840 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:01,441 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-06-05 21:11:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:11:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:01,465 INFO L225 Difference]: With dead ends: 22805 [2021-06-05 21:11:01,466 INFO L226 Difference]: Without dead ends: 22788 [2021-06-05 21:11:01,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-06-05 21:11:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-06-05 21:11:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-06-05 21:11:01,833 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-06-05 21:11:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:01,833 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-06-05 21:11:01,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-06-05 21:11:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:01,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:01,844 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:02,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:02,045 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-06-05 21:11:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:02,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927825772] [2021-06-05 21:11:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:02,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:02,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927825772] [2021-06-05 21:11:02,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927825772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:02,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11474037] [2021-06-05 21:11:02,224 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 21:11:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11474037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:02,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:02,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156098180] [2021-06-05 21:11:02,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:02,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:02,571 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:03,244 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-06-05 21:11:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:03,276 INFO L225 Difference]: With dead ends: 23126 [2021-06-05 21:11:03,276 INFO L226 Difference]: Without dead ends: 23109 [2021-06-05 21:11:03,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-06-05 21:11:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-06-05 21:11:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-06-05 21:11:03,572 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-06-05 21:11:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:03,572 INFO L482 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-06-05 21:11:03,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-06-05 21:11:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:03,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:03,585 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:03,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:03,786 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-06-05 21:11:03,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:03,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828333106] [2021-06-05 21:11:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:03,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828333106] [2021-06-05 21:11:03,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828333106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677341603] [2021-06-05 21:11:03,931 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 21:11:03,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677341603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:04,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035200474] [2021-06-05 21:11:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:04,181 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:04,913 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-06-05 21:11:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:11:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:04,940 INFO L225 Difference]: With dead ends: 24322 [2021-06-05 21:11:04,940 INFO L226 Difference]: Without dead ends: 24288 [2021-06-05 21:11:04,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:11:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-06-05 21:11:05,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-06-05 21:11:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-06-05 21:11:05,281 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-06-05 21:11:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:05,281 INFO L482 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-06-05 21:11:05,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-06-05 21:11:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:05,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:05,296 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:05,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:05,497 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-06-05 21:11:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:05,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698201645] [2021-06-05 21:11:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:05,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:05,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698201645] [2021-06-05 21:11:05,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698201645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:05,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317225432] [2021-06-05 21:11:05,646 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 21:11:05,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:11:05,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:05,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317225432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:05,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:05,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:11:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801099448] [2021-06-05 21:11:05,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:05,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:05,929 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:07,020 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-06-05 21:11:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:11:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:07,055 INFO L225 Difference]: With dead ends: 27871 [2021-06-05 21:11:07,055 INFO L226 Difference]: Without dead ends: 27837 [2021-06-05 21:11:07,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 668.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:11:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-06-05 21:11:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-06-05 21:11:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-06-05 21:11:07,388 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-06-05 21:11:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:07,389 INFO L482 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-06-05 21:11:07,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-06-05 21:11:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:07,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:07,403 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:07,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:07,604 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-06-05 21:11:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:07,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851106636] [2021-06-05 21:11:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:07,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851106636] [2021-06-05 21:11:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851106636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129108589] [2021-06-05 21:11:07,742 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 21:11:07,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:08,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129108589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:08,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:08,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:11:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448303553] [2021-06-05 21:11:08,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:08,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:08,022 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 21:11:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:09,038 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-06-05 21:11:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:11:09,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:09,074 INFO L225 Difference]: With dead ends: 28307 [2021-06-05 21:11:09,075 INFO L226 Difference]: Without dead ends: 28255 [2021-06-05 21:11:09,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:11:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-06-05 21:11:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-06-05 21:11:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-06-05 21:11:09,468 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-06-05 21:11:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:09,468 INFO L482 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-06-05 21:11:09,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 21:11:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-06-05 21:11:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:09,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:09,483 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:09,684 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-06-05 21:11:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:09,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459487200] [2021-06-05 21:11:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:09,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:09,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459487200] [2021-06-05 21:11:09,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459487200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:09,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662988196] [2021-06-05 21:11:09,821 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 21:11:09,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:11:09,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:10,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662988196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:10,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:10,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:10,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682442915] [2021-06-05 21:11:10,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:10,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:10,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:10,067 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:10,659 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-06-05 21:11:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:10,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:10,691 INFO L225 Difference]: With dead ends: 27788 [2021-06-05 21:11:10,691 INFO L226 Difference]: Without dead ends: 27745 [2021-06-05 21:11:10,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-06-05 21:11:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-06-05 21:11:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-06-05 21:11:11,010 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-06-05 21:11:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:11,010 INFO L482 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-06-05 21:11:11,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-06-05 21:11:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:11,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:11,024 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:11,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 21:11:11,224 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:11,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-06-05 21:11:11,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:11,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373900271] [2021-06-05 21:11:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:11,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373900271] [2021-06-05 21:11:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373900271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032887223] [2021-06-05 21:11:11,365 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 21:11:11,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:11:11,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:11,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032887223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:11,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:11,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:11:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728096320] [2021-06-05 21:11:11,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 21:11:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 21:11:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:11:11,688 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:12,979 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-06-05 21:11:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:11:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:13,024 INFO L225 Difference]: With dead ends: 36328 [2021-06-05 21:11:13,024 INFO L226 Difference]: Without dead ends: 36251 [2021-06-05 21:11:13,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:11:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-06-05 21:11:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-06-05 21:11:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-06-05 21:11:13,490 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-06-05 21:11:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:13,492 INFO L482 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-06-05 21:11:13,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-06-05 21:11:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:13,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:13,510 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:13,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:13,711 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-06-05 21:11:13,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:13,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734072062] [2021-06-05 21:11:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:13,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734072062] [2021-06-05 21:11:13,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734072062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452549548] [2021-06-05 21:11:13,851 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 21:11:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:14,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452549548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:14,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:14,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:11:14,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287491238] [2021-06-05 21:11:14,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:11:14,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:11:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:14,126 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:14,881 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-06-05 21:11:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:11:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:14,931 INFO L225 Difference]: With dead ends: 33748 [2021-06-05 21:11:14,932 INFO L226 Difference]: Without dead ends: 33715 [2021-06-05 21:11:14,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:11:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-06-05 21:11:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-06-05 21:11:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-06-05 21:11:15,537 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-06-05 21:11:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:15,537 INFO L482 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-06-05 21:11:15,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-06-05 21:11:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:15,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:15,555 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:15,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 21:11:15,756 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-06-05 21:11:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205721587] [2021-06-05 21:11:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:15,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:15,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205721587] [2021-06-05 21:11:15,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205721587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:15,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238195878] [2021-06-05 21:11:15,934 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 21:11:15,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:15,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:15,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238195878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:16,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:16,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 21:11:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373114636] [2021-06-05 21:11:16,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:11:16,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:11:16,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:16,267 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:16,934 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-06-05 21:11:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:11:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:16,979 INFO L225 Difference]: With dead ends: 35110 [2021-06-05 21:11:16,979 INFO L226 Difference]: Without dead ends: 35069 [2021-06-05 21:11:16,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-06-05 21:11:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-06-05 21:11:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-06-05 21:11:17,452 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-06-05 21:11:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:17,452 INFO L482 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-06-05 21:11:17,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-06-05 21:11:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:17,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:17,470 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:17,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 21:11:17,671 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:17,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-06-05 21:11:17,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:17,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898447348] [2021-06-05 21:11:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:17,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:17,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898447348] [2021-06-05 21:11:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898447348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:17,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238512480] [2021-06-05 21:11:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:11:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:11:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238512480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:18,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:18,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:11:18,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89668660] [2021-06-05 21:11:18,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 21:11:18,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 21:11:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:11:18,166 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:19,576 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-06-05 21:11:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:11:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:19,624 INFO L225 Difference]: With dead ends: 40688 [2021-06-05 21:11:19,624 INFO L226 Difference]: Without dead ends: 40654 [2021-06-05 21:11:19,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 855.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:11:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-06-05 21:11:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-06-05 21:11:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-06-05 21:11:20,130 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-06-05 21:11:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:20,130 INFO L482 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-06-05 21:11:20,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-06-05 21:11:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:20,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:20,147 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:20,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:20,347 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-06-05 21:11:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:20,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456449534] [2021-06-05 21:11:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:20,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456449534] [2021-06-05 21:11:20,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456449534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581048733] [2021-06-05 21:11:20,488 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 21:11:20,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581048733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:20,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:20,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:11:20,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824131607] [2021-06-05 21:11:20,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:20,770 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:21,532 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-06-05 21:11:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:11:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:21,580 INFO L225 Difference]: With dead ends: 40320 [2021-06-05 21:11:21,581 INFO L226 Difference]: Without dead ends: 40277 [2021-06-05 21:11:21,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:11:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-06-05 21:11:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-06-05 21:11:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-06-05 21:11:22,274 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-06-05 21:11:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:22,274 INFO L482 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-06-05 21:11:22,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-06-05 21:11:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:22,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:22,293 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:22,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:22,501 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-06-05 21:11:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056078030] [2021-06-05 21:11:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:22,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056078030] [2021-06-05 21:11:22,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056078030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423383096] [2021-06-05 21:11:22,843 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 21:11:22,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:11:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:23,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423383096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:23,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:23,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:11:23,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745120891] [2021-06-05 21:11:23,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:11:23,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:11:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:23,118 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:23,884 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-06-05 21:11:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:11:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:23,929 INFO L225 Difference]: With dead ends: 39152 [2021-06-05 21:11:23,929 INFO L226 Difference]: Without dead ends: 39118 [2021-06-05 21:11:23,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:11:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-06-05 21:11:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-06-05 21:11:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-06-05 21:11:24,468 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-06-05 21:11:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:24,468 INFO L482 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-06-05 21:11:24,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-06-05 21:11:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:24,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:24,608 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:24,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:24,829 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-06-05 21:11:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:24,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972647222] [2021-06-05 21:11:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:24,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972647222] [2021-06-05 21:11:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972647222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785516801] [2021-06-05 21:11:24,972 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 21:11:24,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:11:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:24,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:25,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785516801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:25,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:25,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:25,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392480841] [2021-06-05 21:11:25,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:25,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:25,225 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:25,954 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-06-05 21:11:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:11:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:26,014 INFO L225 Difference]: With dead ends: 39710 [2021-06-05 21:11:26,014 INFO L226 Difference]: Without dead ends: 39676 [2021-06-05 21:11:26,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:11:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-06-05 21:11:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-06-05 21:11:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-06-05 21:11:26,560 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-06-05 21:11:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:26,560 INFO L482 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-06-05 21:11:26,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-06-05 21:11:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:26,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:26,578 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:26,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 21:11:26,779 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-06-05 21:11:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302036317] [2021-06-05 21:11:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:26,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:26,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302036317] [2021-06-05 21:11:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302036317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:26,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198123794] [2021-06-05 21:11:26,915 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 21:11:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:27,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198123794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:27,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:27,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:11:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90986821] [2021-06-05 21:11:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:11:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:11:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:27,339 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:28,139 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-06-05 21:11:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:11:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:28,197 INFO L225 Difference]: With dead ends: 41067 [2021-06-05 21:11:28,197 INFO L226 Difference]: Without dead ends: 41033 [2021-06-05 21:11:28,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 623.3ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:11:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-06-05 21:11:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-06-05 21:11:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-06-05 21:11:28,805 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-06-05 21:11:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:28,805 INFO L482 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-06-05 21:11:28,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-06-05 21:11:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:28,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:28,824 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:29,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:29,025 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-06-05 21:11:29,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:29,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956811668] [2021-06-05 21:11:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:29,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956811668] [2021-06-05 21:11:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956811668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144292511] [2021-06-05 21:11:29,290 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 21:11:29,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:29,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:29,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144292511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:29,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:29,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:11:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977178299] [2021-06-05 21:11:29,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:29,575 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:30,481 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-06-05 21:11:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:30,543 INFO L225 Difference]: With dead ends: 42419 [2021-06-05 21:11:30,543 INFO L226 Difference]: Without dead ends: 42376 [2021-06-05 21:11:30,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:11:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-06-05 21:11:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-06-05 21:11:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-06-05 21:11:31,246 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-06-05 21:11:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:31,246 INFO L482 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-06-05 21:11:31,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-06-05 21:11:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:31,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:31,262 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:31,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 21:11:31,463 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-06-05 21:11:31,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:31,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510059173] [2021-06-05 21:11:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510059173] [2021-06-05 21:11:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510059173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328869036] [2021-06-05 21:11:31,630 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 21:11:31,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:11:31,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:31,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328869036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:31,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:31,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:31,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030005818] [2021-06-05 21:11:31,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:31,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:31,969 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:32,655 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-06-05 21:11:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:11:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:32,703 INFO L225 Difference]: With dead ends: 40507 [2021-06-05 21:11:32,703 INFO L226 Difference]: Without dead ends: 40490 [2021-06-05 21:11:32,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-06-05 21:11:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-06-05 21:11:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-06-05 21:11:33,302 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-06-05 21:11:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:33,302 INFO L482 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-06-05 21:11:33,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-06-05 21:11:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:33,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:33,322 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:33,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:33,522 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-06-05 21:11:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:33,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042455051] [2021-06-05 21:11:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:33,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:33,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042455051] [2021-06-05 21:11:33,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042455051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:33,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110235188] [2021-06-05 21:11:33,700 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 21:11:33,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:33,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:33,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110235188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:33,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:33,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293760638] [2021-06-05 21:11:33,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:33,980 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:34,833 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-06-05 21:11:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:34,893 INFO L225 Difference]: With dead ends: 40827 [2021-06-05 21:11:34,893 INFO L226 Difference]: Without dead ends: 40810 [2021-06-05 21:11:34,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:11:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-06-05 21:11:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-06-05 21:11:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-06-05 21:11:35,548 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-06-05 21:11:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:35,548 INFO L482 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-06-05 21:11:35,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-06-05 21:11:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:35,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:35,567 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:35,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:35,767 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-06-05 21:11:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:35,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074620101] [2021-06-05 21:11:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:35,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:35,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074620101] [2021-06-05 21:11:35,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074620101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:35,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807822119] [2021-06-05 21:11:35,910 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 21:11:35,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:11:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807822119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:36,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:36,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:11:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583011572] [2021-06-05 21:11:36,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:11:36,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:11:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:11:36,367 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:37,233 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-06-05 21:11:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:11:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:37,293 INFO L225 Difference]: With dead ends: 41685 [2021-06-05 21:11:37,293 INFO L226 Difference]: Without dead ends: 41668 [2021-06-05 21:11:37,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:11:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-06-05 21:11:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-06-05 21:11:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-06-05 21:11:37,987 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-06-05 21:11:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:37,987 INFO L482 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-06-05 21:11:37,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-06-05 21:11:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:38,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:38,007 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:38,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 21:11:38,207 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-06-05 21:11:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:38,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323557934] [2021-06-05 21:11:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:38,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323557934] [2021-06-05 21:11:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323557934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301083690] [2021-06-05 21:11:38,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:11:38,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:11:38,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:38,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:38,594 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 21:11:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301083690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:38,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133780711] [2021-06-05 21:11:38,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:38,731 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:39,484 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-06-05 21:11:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:11:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:39,536 INFO L225 Difference]: With dead ends: 41871 [2021-06-05 21:11:39,536 INFO L226 Difference]: Without dead ends: 41837 [2021-06-05 21:11:39,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:11:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-06-05 21:11:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-06-05 21:11:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-06-05 21:11:40,131 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-06-05 21:11:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:40,132 INFO L482 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-06-05 21:11:40,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-06-05 21:11:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:40,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:40,156 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:40,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 21:11:40,357 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:40,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-06-05 21:11:40,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:40,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983184605] [2021-06-05 21:11:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:40,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:40,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983184605] [2021-06-05 21:11:40,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983184605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:40,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813719567] [2021-06-05 21:11:40,491 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 21:11:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813719567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:40,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:40,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 21:11:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381063039] [2021-06-05 21:11:40,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:11:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:11:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:40,764 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:41,599 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-06-05 21:11:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:11:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:41,651 INFO L225 Difference]: With dead ends: 43352 [2021-06-05 21:11:41,651 INFO L226 Difference]: Without dead ends: 43318 [2021-06-05 21:11:41,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:11:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-06-05 21:11:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-06-05 21:11:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-06-05 21:11:42,295 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-06-05 21:11:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:42,296 INFO L482 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-06-05 21:11:42,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-06-05 21:11:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:42,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:42,314 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:42,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:42,515 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-06-05 21:11:42,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:42,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832636814] [2021-06-05 21:11:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:42,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:42,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832636814] [2021-06-05 21:11:42,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832636814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:42,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73202739] [2021-06-05 21:11:42,666 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 21:11:42,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:42,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73202739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:42,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:42,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 21:11:42,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641784575] [2021-06-05 21:11:42,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:42,964 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:43,725 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-06-05 21:11:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:11:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:43,775 INFO L225 Difference]: With dead ends: 44617 [2021-06-05 21:11:43,776 INFO L226 Difference]: Without dead ends: 44574 [2021-06-05 21:11:43,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:11:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-06-05 21:11:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-06-05 21:11:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-06-05 21:11:44,484 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-06-05 21:11:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:44,484 INFO L482 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-06-05 21:11:44,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-06-05 21:11:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:44,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:44,504 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:44,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:11:44,705 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-06-05 21:11:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:44,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332505109] [2021-06-05 21:11:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:44,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:44,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332505109] [2021-06-05 21:11:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332505109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:44,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540300007] [2021-06-05 21:11:44,845 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 21:11:44,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:11:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:45,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540300007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:45,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:45,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:45,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764095777] [2021-06-05 21:11:45,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:45,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:45,108 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:45,651 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-06-05 21:11:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:11:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:45,710 INFO L225 Difference]: With dead ends: 43750 [2021-06-05 21:11:45,710 INFO L226 Difference]: Without dead ends: 43733 [2021-06-05 21:11:45,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:11:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-06-05 21:11:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-06-05 21:11:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-06-05 21:11:46,441 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-06-05 21:11:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:46,441 INFO L482 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-06-05 21:11:46,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-06-05 21:11:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:11:46,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:46,461 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:46,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:11:46,662 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-06-05 21:11:46,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:46,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690729968] [2021-06-05 21:11:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:46,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:46,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690729968] [2021-06-05 21:11:46,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690729968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:46,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402090537] [2021-06-05 21:11:46,962 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 21:11:46,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:46,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:46,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:11:46,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:47,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402090537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:47,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:47,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 21:11:47,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308714324] [2021-06-05 21:11:47,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:47,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:47,231 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:47,837 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-06-05 21:11:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:11:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:47,901 INFO L225 Difference]: With dead ends: 44087 [2021-06-05 21:11:47,901 INFO L226 Difference]: Without dead ends: 44070 [2021-06-05 21:11:47,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 628.6ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:11:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-06-05 21:11:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-06-05 21:11:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-06-05 21:11:48,603 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-06-05 21:11:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:48,603 INFO L482 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-06-05 21:11:48,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-06-05 21:11:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:48,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:48,622 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:48,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:11:48,827 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-06-05 21:11:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:48,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232357811] [2021-06-05 21:11:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:48,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:48,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232357811] [2021-06-05 21:11:48,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232357811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:48,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613406005] [2021-06-05 21:11:48,858 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 21:11:48,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:11:48,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:48,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:48,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613406005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:48,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:48,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:11:48,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751758408] [2021-06-05 21:11:48,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:11:48,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:11:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:11:48,934 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:49,144 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-06-05 21:11:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:11:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:49,222 INFO L225 Difference]: With dead ends: 54955 [2021-06-05 21:11:49,222 INFO L226 Difference]: Without dead ends: 54921 [2021-06-05 21:11:49,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:11:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-06-05 21:11:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-06-05 21:11:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-06-05 21:11:50,167 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-06-05 21:11:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:50,167 INFO L482 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-06-05 21:11:50,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-06-05 21:11:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:50,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:50,403 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:50,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:50,611 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-06-05 21:11:50,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:50,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167200055] [2021-06-05 21:11:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:50,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167200055] [2021-06-05 21:11:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167200055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817586654] [2021-06-05 21:11:50,630 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 21:11:50,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:11:50,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:50,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:11:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817586654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:50,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:50,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:11:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143918219] [2021-06-05 21:11:50,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:11:50,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:11:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:11:50,699 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:50,879 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-06-05 21:11:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:11:50,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:50,954 INFO L225 Difference]: With dead ends: 54798 [2021-06-05 21:11:50,954 INFO L226 Difference]: Without dead ends: 54798 [2021-06-05 21:11:50,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:11:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-06-05 21:11:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-06-05 21:11:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-06-05 21:11:51,778 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-06-05 21:11:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:51,778 INFO L482 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-06-05 21:11:51,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-06-05 21:11:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:51,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:51,797 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:51,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 21:11:51,998 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:51,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-06-05 21:11:51,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:51,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717353925] [2021-06-05 21:11:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:52,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717353925] [2021-06-05 21:11:52,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717353925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073978787] [2021-06-05 21:11:52,024 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 21:11:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:11:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073978787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:52,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:52,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:11:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755178368] [2021-06-05 21:11:52,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:11:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:11:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:11:52,096 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:52,304 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-06-05 21:11:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:11:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:52,376 INFO L225 Difference]: With dead ends: 51794 [2021-06-05 21:11:52,376 INFO L226 Difference]: Without dead ends: 51790 [2021-06-05 21:11:52,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:11:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-06-05 21:11:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-06-05 21:11:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-06-05 21:11:53,301 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-06-05 21:11:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:53,301 INFO L482 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-06-05 21:11:53,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-06-05 21:11:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:53,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:53,319 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:53,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 21:11:53,519 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-06-05 21:11:53,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:53,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239284608] [2021-06-05 21:11:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:11:53,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239284608] [2021-06-05 21:11:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239284608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702265489] [2021-06-05 21:11:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:11:53,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:11:53,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702265489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:53,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:53,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:11:53,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659143073] [2021-06-05 21:11:53,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:11:53,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:53,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:11:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:11:53,632 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:53,846 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-06-05 21:11:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:11:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:54,159 INFO L225 Difference]: With dead ends: 53808 [2021-06-05 21:11:54,159 INFO L226 Difference]: Without dead ends: 53805 [2021-06-05 21:11:54,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:11:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-06-05 21:11:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-06-05 21:11:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-06-05 21:11:55,043 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-06-05 21:11:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:55,043 INFO L482 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-06-05 21:11:55,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-06-05 21:11:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:55,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:55,063 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:55,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 21:11:55,264 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-06-05 21:11:55,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:55,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793613187] [2021-06-05 21:11:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:55,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:55,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793613187] [2021-06-05 21:11:55,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793613187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:55,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344767487] [2021-06-05 21:11:55,289 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 21:11:55,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:11:55,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:55,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:55,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:11:55,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344767487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:55,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:55,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:11:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077807135] [2021-06-05 21:11:55,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:11:55,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:11:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:11:55,379 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:55,594 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-06-05 21:11:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:11:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:55,670 INFO L225 Difference]: With dead ends: 52855 [2021-06-05 21:11:55,670 INFO L226 Difference]: Without dead ends: 52852 [2021-06-05 21:11:55,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:11:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-06-05 21:11:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-06-05 21:11:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-06-05 21:11:56,704 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-06-05 21:11:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:56,704 INFO L482 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-06-05 21:11:56,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-06-05 21:11:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:56,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:56,734 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:56,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:56,958 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-06-05 21:11:56,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:56,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077150065] [2021-06-05 21:11:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:56,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:56,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077150065] [2021-06-05 21:11:56,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077150065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:56,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424896167] [2021-06-05 21:11:56,992 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 21:11:57,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:57,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:11:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424896167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:57,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:57,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:11:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914641518] [2021-06-05 21:11:57,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:11:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:11:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:11:57,077 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:57,349 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-06-05 21:11:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:11:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:57,440 INFO L225 Difference]: With dead ends: 50891 [2021-06-05 21:11:57,441 INFO L226 Difference]: Without dead ends: 50871 [2021-06-05 21:11:57,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:11:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-06-05 21:11:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-06-05 21:11:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-06-05 21:11:58,595 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-06-05 21:11:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:58,595 INFO L482 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-06-05 21:11:58,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-06-05 21:11:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:11:58,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:58,614 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:58,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:58,815 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:58,815 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-06-05 21:11:58,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:58,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157077867] [2021-06-05 21:11:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:58,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157077867] [2021-06-05 21:11:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157077867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885286783] [2021-06-05 21:11:58,837 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 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 21:11:58,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:11:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:11:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:11:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885286783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:58,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:58,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:11:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805858456] [2021-06-05 21:11:58,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:11:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:11:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:11:58,902 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:59,088 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-06-05 21:11:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:11:59,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:11:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:59,154 INFO L225 Difference]: With dead ends: 51054 [2021-06-05 21:11:59,155 INFO L226 Difference]: Without dead ends: 51050 [2021-06-05 21:11:59,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:11:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-06-05 21:11:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-06-05 21:11:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-06-05 21:12:00,026 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-06-05 21:12:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:00,026 INFO L482 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-06-05 21:12:00,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-06-05 21:12:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:12:00,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:00,044 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:00,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:00,245 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-06-05 21:12:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:00,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180014462] [2021-06-05 21:12:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:00,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:00,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180014462] [2021-06-05 21:12:00,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180014462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:00,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698418461] [2021-06-05 21:12:00,265 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 21:12:00,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:12:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:12:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:12:00,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698418461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:00,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:00,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:12:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996001865] [2021-06-05 21:12:00,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:12:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:12:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:12:00,546 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:00,758 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-06-05 21:12:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:12:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:00,856 INFO L225 Difference]: With dead ends: 52488 [2021-06-05 21:12:00,856 INFO L226 Difference]: Without dead ends: 52485 [2021-06-05 21:12:00,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-06-05 21:12:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-06-05 21:12:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-06-05 21:12:01,764 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-06-05 21:12:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:01,764 INFO L482 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-06-05 21:12:01,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-06-05 21:12:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:12:01,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:01,783 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:01,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 21:12:01,983 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-06-05 21:12:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:01,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544586866] [2021-06-05 21:12:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:12:02,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544586866] [2021-06-05 21:12:02,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544586866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373672092] [2021-06-05 21:12:02,007 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 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 21:12:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:12:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:12:02,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373672092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:02,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:02,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:12:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442949966] [2021-06-05 21:12:02,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:12:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:12:02,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:12:02,085 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:02,318 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-06-05 21:12:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:12:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:12:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:02,390 INFO L225 Difference]: With dead ends: 52380 [2021-06-05 21:12:02,390 INFO L226 Difference]: Without dead ends: 52368 [2021-06-05 21:12:02,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:12:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-06-05 21:12:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-06-05 21:12:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-06-05 21:12:03,366 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-06-05 21:12:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:03,366 INFO L482 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-06-05 21:12:03,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-06-05 21:12:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 21:12:03,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:03,384 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:03,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 21:12:03,584 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-06-05 21:12:03,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:03,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443432329] [2021-06-05 21:12:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:03,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:03,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443432329] [2021-06-05 21:12:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443432329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:03,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83170952] [2021-06-05 21:12:03,615 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 21:12:03,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:12:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:03,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83170952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:03,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:03,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:12:03,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549717823] [2021-06-05 21:12:03,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:12:03,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:03,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:12:03,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:12:03,713 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:03,916 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-06-05 21:12:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 21:12:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:03,982 INFO L225 Difference]: With dead ends: 51895 [2021-06-05 21:12:03,982 INFO L226 Difference]: Without dead ends: 51883 [2021-06-05 21:12:03,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:12:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-06-05 21:12:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-06-05 21:12:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-06-05 21:12:04,892 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-06-05 21:12:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:04,892 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-06-05 21:12:04,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-06-05 21:12:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 21:12:04,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:04,910 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:05,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 21:12:05,113 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-06-05 21:12:05,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:05,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777246879] [2021-06-05 21:12:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:12:05,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:05,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777246879] [2021-06-05 21:12:05,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777246879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:05,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962126503] [2021-06-05 21:12:05,201 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 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 21:12:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:12:05,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 21:12:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962126503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:05,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:12:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657967556] [2021-06-05 21:12:05,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:12:05,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:12:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:12:05,339 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:05,794 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-06-05 21:12:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:12:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 21:12:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:05,866 INFO L225 Difference]: With dead ends: 50941 [2021-06-05 21:12:05,867 INFO L226 Difference]: Without dead ends: 50818 [2021-06-05 21:12:05,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:12:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-06-05 21:12:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-06-05 21:12:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-06-05 21:12:06,765 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-06-05 21:12:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:06,765 INFO L482 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-06-05 21:12:06,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-06-05 21:12:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:12:06,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:06,786 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:06,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 21:12:06,986 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-06-05 21:12:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015577904] [2021-06-05 21:12:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:07,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:07,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015577904] [2021-06-05 21:12:07,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015577904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:07,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170452137] [2021-06-05 21:12:07,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:07,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:12:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:12:07,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:07,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170452137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:07,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:07,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 21:12:07,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430899841] [2021-06-05 21:12:07,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:12:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:12:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:12:07,194 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:07,743 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-06-05 21:12:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:12:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:12:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:07,836 INFO L225 Difference]: With dead ends: 54165 [2021-06-05 21:12:07,836 INFO L226 Difference]: Without dead ends: 54165 [2021-06-05 21:12:07,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:12:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-06-05 21:12:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-06-05 21:12:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-06-05 21:12:08,529 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-06-05 21:12:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:08,529 INFO L482 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-06-05 21:12:08,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:08,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-06-05 21:12:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:12:08,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:08,552 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:08,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 21:12:08,762 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-06-05 21:12:08,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:08,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117365432] [2021-06-05 21:12:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:08,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117365432] [2021-06-05 21:12:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117365432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318693647] [2021-06-05 21:12:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:08,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:08,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:12:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318693647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:08,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:08,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 21:12:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647123206] [2021-06-05 21:12:08,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:12:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:08,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:12:08,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:12:08,939 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:09,181 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-06-05 21:12:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:09,381 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-06-05 21:12:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:12:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:12:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:09,426 INFO L225 Difference]: With dead ends: 34622 [2021-06-05 21:12:09,426 INFO L226 Difference]: Without dead ends: 34550 [2021-06-05 21:12:09,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-06-05 21:12:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-06-05 21:12:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-06-05 21:12:09,825 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-06-05 21:12:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:09,825 INFO L482 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-06-05 21:12:09,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-06-05 21:12:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:09,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:09,841 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:10,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:10,041 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-06-05 21:12:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42616936] [2021-06-05 21:12:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:10,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42616936] [2021-06-05 21:12:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42616936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:10,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157550557] [2021-06-05 21:12:10,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:10,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:12:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:10,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157550557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:10,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:10,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 21:12:10,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54010019] [2021-06-05 21:12:10,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:10,409 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:11,199 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-06-05 21:12:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:12:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:11,237 INFO L225 Difference]: With dead ends: 33955 [2021-06-05 21:12:11,237 INFO L226 Difference]: Without dead ends: 33895 [2021-06-05 21:12:11,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:12:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-06-05 21:12:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-06-05 21:12:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-06-05 21:12:11,636 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-06-05 21:12:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:11,636 INFO L482 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-06-05 21:12:11,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-06-05 21:12:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:11,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:11,652 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:11,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 21:12:11,853 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-06-05 21:12:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77970062] [2021-06-05 21:12:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:11,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:11,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77970062] [2021-06-05 21:12:11,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77970062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:11,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627641817] [2021-06-05 21:12:11,986 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 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 21:12:12,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:12:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627641817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:12,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:12,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 21:12:12,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000299032] [2021-06-05 21:12:12,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:12,221 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:12,931 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-06-05 21:12:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:12:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:12,968 INFO L225 Difference]: With dead ends: 34237 [2021-06-05 21:12:12,968 INFO L226 Difference]: Without dead ends: 34177 [2021-06-05 21:12:12,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:12:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-06-05 21:12:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-06-05 21:12:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-06-05 21:12:13,345 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-06-05 21:12:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:13,345 INFO L482 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-06-05 21:12:13,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-06-05 21:12:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:13,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:13,362 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:13,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:13,563 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-06-05 21:12:13,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:13,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054787645] [2021-06-05 21:12:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:13,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:13,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054787645] [2021-06-05 21:12:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054787645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:13,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289891356] [2021-06-05 21:12:13,692 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 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 21:12:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289891356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:13,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:13,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 21:12:13,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497917647] [2021-06-05 21:12:13,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:13,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:13,927 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:14,624 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-06-05 21:12:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:12:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:14,662 INFO L225 Difference]: With dead ends: 35020 [2021-06-05 21:12:14,662 INFO L226 Difference]: Without dead ends: 34968 [2021-06-05 21:12:14,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:12:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-06-05 21:12:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-06-05 21:12:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-06-05 21:12:15,035 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-06-05 21:12:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:15,035 INFO L482 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-06-05 21:12:15,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-06-05 21:12:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:15,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:15,052 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:15,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:15,253 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-06-05 21:12:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:15,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280124757] [2021-06-05 21:12:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:15,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:15,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280124757] [2021-06-05 21:12:15,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280124757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126000644] [2021-06-05 21:12:15,382 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 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 21:12:15,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:15,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126000644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:15,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:15,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948962829] [2021-06-05 21:12:15,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:15,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:15,628 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:16,221 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-06-05 21:12:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:12:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:16,264 INFO L225 Difference]: With dead ends: 35348 [2021-06-05 21:12:16,265 INFO L226 Difference]: Without dead ends: 35287 [2021-06-05 21:12:16,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:12:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-06-05 21:12:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-06-05 21:12:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-06-05 21:12:16,698 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-06-05 21:12:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:16,698 INFO L482 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-06-05 21:12:16,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-06-05 21:12:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:16,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:16,717 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:16,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 21:12:16,918 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-06-05 21:12:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:16,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594766755] [2021-06-05 21:12:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:17,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:17,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594766755] [2021-06-05 21:12:17,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594766755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:17,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837638730] [2021-06-05 21:12:17,051 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 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 21:12:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:12:17,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:17,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837638730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:17,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:17,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:17,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908614447] [2021-06-05 21:12:17,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:17,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:17,309 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:18,123 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-06-05 21:12:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:12:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:18,177 INFO L225 Difference]: With dead ends: 37628 [2021-06-05 21:12:18,177 INFO L226 Difference]: Without dead ends: 37564 [2021-06-05 21:12:18,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:12:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-06-05 21:12:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-06-05 21:12:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-06-05 21:12:18,651 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-06-05 21:12:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:18,651 INFO L482 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-06-05 21:12:18,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-06-05 21:12:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:18,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:18,670 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:18,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:18,872 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-06-05 21:12:18,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:18,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485474761] [2021-06-05 21:12:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:19,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485474761] [2021-06-05 21:12:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485474761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434286037] [2021-06-05 21:12:19,004 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 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 21:12:19,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:19,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:19,265 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 21:12:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:19,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434286037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:19,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:19,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 21:12:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549670625] [2021-06-05 21:12:19,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:19,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:19,366 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:20,016 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-06-05 21:12:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:12:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:20,064 INFO L225 Difference]: With dead ends: 37468 [2021-06-05 21:12:20,064 INFO L226 Difference]: Without dead ends: 37424 [2021-06-05 21:12:20,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:12:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-06-05 21:12:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-06-05 21:12:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-06-05 21:12:20,501 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-06-05 21:12:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:20,501 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-06-05 21:12:20,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-06-05 21:12:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:20,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:20,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:20,720 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-06-05 21:12:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225182904] [2021-06-05 21:12:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:20,938 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 21:12:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:20,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:20,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225182904] [2021-06-05 21:12:20,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225182904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:20,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621260031] [2021-06-05 21:12:20,995 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 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 21:12:21,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:12:21,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:21,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621260031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:21,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:21,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 21:12:21,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434614035] [2021-06-05 21:12:21,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:21,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:21,236 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:21,922 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-06-05 21:12:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:12:21,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:21,968 INFO L225 Difference]: With dead ends: 37883 [2021-06-05 21:12:21,968 INFO L226 Difference]: Without dead ends: 37825 [2021-06-05 21:12:21,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:12:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-06-05 21:12:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-06-05 21:12:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-06-05 21:12:22,602 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-06-05 21:12:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:22,602 INFO L482 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-06-05 21:12:22,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 21:12:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-06-05 21:12:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:22,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:22,621 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 21:12:22,822 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-06-05 21:12:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316143582] [2021-06-05 21:12:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:22,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316143582] [2021-06-05 21:12:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316143582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866410573] [2021-06-05 21:12:22,963 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 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 21:12:22,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:12:22,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:23,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866410573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:23,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:23,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:23,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85298585] [2021-06-05 21:12:23,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:23,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:23,213 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:24,004 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-06-05 21:12:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:12:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:24,052 INFO L225 Difference]: With dead ends: 42560 [2021-06-05 21:12:24,052 INFO L226 Difference]: Without dead ends: 42505 [2021-06-05 21:12:24,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:12:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-06-05 21:12:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-06-05 21:12:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-06-05 21:12:24,633 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-06-05 21:12:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:24,633 INFO L482 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-06-05 21:12:24,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-06-05 21:12:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:24,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:24,652 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:24,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:24,852 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-06-05 21:12:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:24,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787500382] [2021-06-05 21:12:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:24,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:24,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787500382] [2021-06-05 21:12:24,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787500382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592879087] [2021-06-05 21:12:24,982 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 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 21:12:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592879087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:25,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:25,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:25,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763754789] [2021-06-05 21:12:25,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:25,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:25,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:25,229 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:25,713 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-06-05 21:12:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:12:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:25,758 INFO L225 Difference]: With dead ends: 42177 [2021-06-05 21:12:25,758 INFO L226 Difference]: Without dead ends: 42122 [2021-06-05 21:12:25,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-06-05 21:12:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-06-05 21:12:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-06-05 21:12:26,383 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-06-05 21:12:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:26,383 INFO L482 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-06-05 21:12:26,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-06-05 21:12:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:26,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:26,407 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:26,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:12:26,608 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-06-05 21:12:26,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:26,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181751273] [2021-06-05 21:12:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:26,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:26,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181751273] [2021-06-05 21:12:26,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181751273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:26,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846133836] [2021-06-05 21:12:26,735 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 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 21:12:26,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846133836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:26,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:26,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:26,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244933798] [2021-06-05 21:12:26,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:26,994 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:27,585 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-06-05 21:12:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:12:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:27,636 INFO L225 Difference]: With dead ends: 43200 [2021-06-05 21:12:27,636 INFO L226 Difference]: Without dead ends: 43139 [2021-06-05 21:12:27,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:12:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-06-05 21:12:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-06-05 21:12:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-06-05 21:12:28,284 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-06-05 21:12:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:28,285 INFO L482 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-06-05 21:12:28,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-06-05 21:12:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:28,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:28,306 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:28,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:28,509 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-06-05 21:12:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:28,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339605546] [2021-06-05 21:12:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:28,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:28,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339605546] [2021-06-05 21:12:28,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339605546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:28,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044742227] [2021-06-05 21:12:28,641 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 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 21:12:28,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:12:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044742227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767933084] [2021-06-05 21:12:28,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:28,912 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:29,964 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-06-05 21:12:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:12:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:30,023 INFO L225 Difference]: With dead ends: 43593 [2021-06-05 21:12:30,023 INFO L226 Difference]: Without dead ends: 43522 [2021-06-05 21:12:30,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:12:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-06-05 21:12:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-06-05 21:12:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-06-05 21:12:30,584 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-06-05 21:12:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:30,585 INFO L482 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-06-05 21:12:30,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-06-05 21:12:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:30,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:30,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:30,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 21:12:30,809 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-06-05 21:12:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312396226] [2021-06-05 21:12:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:30,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:30,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312396226] [2021-06-05 21:12:30,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312396226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:30,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653477020] [2021-06-05 21:12:30,934 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 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 21:12:30,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:30,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:31,342 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 21:12:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:31,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653477020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:31,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:31,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723028438] [2021-06-05 21:12:31,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:31,404 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:32,025 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-06-05 21:12:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:12:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:32,075 INFO L225 Difference]: With dead ends: 44838 [2021-06-05 21:12:32,075 INFO L226 Difference]: Without dead ends: 44755 [2021-06-05 21:12:32,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:12:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-06-05 21:12:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-06-05 21:12:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-06-05 21:12:32,829 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-06-05 21:12:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:32,829 INFO L482 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-06-05 21:12:32,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-06-05 21:12:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:32,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:32,847 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:33,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:33,048 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:33,048 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-06-05 21:12:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:33,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241609009] [2021-06-05 21:12:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:33,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241609009] [2021-06-05 21:12:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241609009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540419333] [2021-06-05 21:12:33,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:33,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:12:33,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:33,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540419333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:33,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:33,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:33,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731605750] [2021-06-05 21:12:33,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:33,509 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:34,150 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-06-05 21:12:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:12:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:34,208 INFO L225 Difference]: With dead ends: 45004 [2021-06-05 21:12:34,208 INFO L226 Difference]: Without dead ends: 44951 [2021-06-05 21:12:34,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:12:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-06-05 21:12:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-06-05 21:12:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-06-05 21:12:34,890 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-06-05 21:12:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:34,890 INFO L482 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-06-05 21:12:34,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-06-05 21:12:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:34,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:34,912 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:35,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 21:12:35,117 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-06-05 21:12:35,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:35,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537644689] [2021-06-05 21:12:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:35,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:35,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537644689] [2021-06-05 21:12:35,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537644689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:35,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508679376] [2021-06-05 21:12:35,256 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 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 21:12:35,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:12:35,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:35,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:35,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508679376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:35,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:35,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633084767] [2021-06-05 21:12:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:35,526 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:36,244 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-06-05 21:12:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:12:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:36,296 INFO L225 Difference]: With dead ends: 47479 [2021-06-05 21:12:36,296 INFO L226 Difference]: Without dead ends: 47408 [2021-06-05 21:12:36,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:12:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-06-05 21:12:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-06-05 21:12:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-06-05 21:12:37,073 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-06-05 21:12:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:37,073 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-06-05 21:12:37,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-06-05 21:12:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:37,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:37,096 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:37,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:37,296 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-06-05 21:12:37,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:37,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299544205] [2021-06-05 21:12:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:37,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:37,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299544205] [2021-06-05 21:12:37,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299544205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:37,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784848986] [2021-06-05 21:12:37,426 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 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 21:12:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784848986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:37,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:37,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 21:12:37,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853427162] [2021-06-05 21:12:37,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:37,647 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:38,227 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-06-05 21:12:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:12:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:38,557 INFO L225 Difference]: With dead ends: 44309 [2021-06-05 21:12:38,558 INFO L226 Difference]: Without dead ends: 44269 [2021-06-05 21:12:38,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-06-05 21:12:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-06-05 21:12:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-06-05 21:12:39,055 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-06-05 21:12:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-06-05 21:12:39,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-06-05 21:12:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:39,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:39,079 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:39,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:39,280 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-06-05 21:12:39,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:39,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090200116] [2021-06-05 21:12:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:39,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:39,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090200116] [2021-06-05 21:12:39,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090200116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:39,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621753614] [2021-06-05 21:12:39,408 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 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 21:12:39,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:39,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621753614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:39,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:39,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:39,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012129575] [2021-06-05 21:12:39,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:39,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:39,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:39,712 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:40,447 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-06-05 21:12:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:12:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:40,495 INFO L225 Difference]: With dead ends: 44985 [2021-06-05 21:12:40,496 INFO L226 Difference]: Without dead ends: 44934 [2021-06-05 21:12:40,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:12:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-06-05 21:12:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-06-05 21:12:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-06-05 21:12:41,047 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-06-05 21:12:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:41,047 INFO L482 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-06-05 21:12:41,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-06-05 21:12:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:41,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:41,068 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:41,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:41,268 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-06-05 21:12:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:41,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400803467] [2021-06-05 21:12:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:41,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:41,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400803467] [2021-06-05 21:12:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400803467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:41,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744823118] [2021-06-05 21:12:41,390 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 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 21:12:41,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:12:41,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744823118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:41,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:41,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30713709] [2021-06-05 21:12:41,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:41,819 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:42,758 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-06-05 21:12:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:12:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:42,813 INFO L225 Difference]: With dead ends: 49164 [2021-06-05 21:12:42,814 INFO L226 Difference]: Without dead ends: 49079 [2021-06-05 21:12:42,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:12:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-06-05 21:12:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-06-05 21:12:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-06-05 21:12:43,556 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-06-05 21:12:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:43,556 INFO L482 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-06-05 21:12:43,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-06-05 21:12:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:43,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:43,590 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:43,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 21:12:43,790 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:43,790 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-06-05 21:12:43,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:43,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130139915] [2021-06-05 21:12:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:43,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130139915] [2021-06-05 21:12:43,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130139915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987816826] [2021-06-05 21:12:43,914 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 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 21:12:43,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987816826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:44,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:44,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837511518] [2021-06-05 21:12:44,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:44,159 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:44,768 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-06-05 21:12:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:12:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:44,825 INFO L225 Difference]: With dead ends: 48735 [2021-06-05 21:12:44,825 INFO L226 Difference]: Without dead ends: 48700 [2021-06-05 21:12:44,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:12:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-06-05 21:12:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-06-05 21:12:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-06-05 21:12:45,506 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-06-05 21:12:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:45,506 INFO L482 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-06-05 21:12:45,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-06-05 21:12:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:45,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:45,532 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:45,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 21:12:45,733 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-06-05 21:12:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582549752] [2021-06-05 21:12:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:45,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582549752] [2021-06-05 21:12:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582549752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249060795] [2021-06-05 21:12:45,854 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 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 21:12:45,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:12:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:46,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249060795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:46,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:46,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 21:12:46,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435419680] [2021-06-05 21:12:46,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:46,091 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:46,656 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-06-05 21:12:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:12:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:46,719 INFO L225 Difference]: With dead ends: 51644 [2021-06-05 21:12:46,720 INFO L226 Difference]: Without dead ends: 51544 [2021-06-05 21:12:46,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-06-05 21:12:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-06-05 21:12:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-06-05 21:12:47,606 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-06-05 21:12:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:47,606 INFO L482 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-06-05 21:12:47,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-06-05 21:12:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:47,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:47,636 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:47,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 21:12:47,836 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-06-05 21:12:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552455080] [2021-06-05 21:12:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:47,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:47,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552455080] [2021-06-05 21:12:47,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552455080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:47,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649747003] [2021-06-05 21:12:47,997 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 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 21:12:48,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:12:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:48,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649747003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:48,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:48,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667196063] [2021-06-05 21:12:48,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:48,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:48,271 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:49,179 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-06-05 21:12:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:12:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:49,255 INFO L225 Difference]: With dead ends: 50673 [2021-06-05 21:12:49,255 INFO L226 Difference]: Without dead ends: 50620 [2021-06-05 21:12:49,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:12:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-06-05 21:12:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-06-05 21:12:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-06-05 21:12:50,232 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-06-05 21:12:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:50,232 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-06-05 21:12:50,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-06-05 21:12:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:50,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:50,267 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:50,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 21:12:50,468 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-06-05 21:12:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144226870] [2021-06-05 21:12:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:50,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144226870] [2021-06-05 21:12:50,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144226870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497141861] [2021-06-05 21:12:50,607 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 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 21:12:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497141861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:50,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:50,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:12:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128834217] [2021-06-05 21:12:50,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:50,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:50,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:50,877 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:51,469 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-06-05 21:12:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:12:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:51,533 INFO L225 Difference]: With dead ends: 50981 [2021-06-05 21:12:51,533 INFO L226 Difference]: Without dead ends: 50938 [2021-06-05 21:12:51,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:12:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-06-05 21:12:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-06-05 21:12:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-06-05 21:12:52,311 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-06-05 21:12:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-06-05 21:12:52,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-06-05 21:12:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:52,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:52,339 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:52,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 21:12:52,540 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-06-05 21:12:52,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:52,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087194482] [2021-06-05 21:12:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:52,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087194482] [2021-06-05 21:12:52,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087194482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045701706] [2021-06-05 21:12:52,670 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 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 21:12:52,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:52,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045701706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:52,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:52,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 21:12:52,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458076101] [2021-06-05 21:12:52,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:52,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:52,899 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:53,512 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-06-05 21:12:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:12:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:53,577 INFO L225 Difference]: With dead ends: 50602 [2021-06-05 21:12:53,577 INFO L226 Difference]: Without dead ends: 50562 [2021-06-05 21:12:53,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:12:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-06-05 21:12:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-06-05 21:12:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-06-05 21:12:54,345 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-06-05 21:12:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:54,345 INFO L482 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-06-05 21:12:54,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-06-05 21:12:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:54,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:54,373 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:54,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:54,573 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1444303521, now seen corresponding path program 129 times [2021-06-05 21:12:54,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:54,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448223016] [2021-06-05 21:12:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:54,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:54,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448223016] [2021-06-05 21:12:54,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448223016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:54,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139886452] [2021-06-05 21:12:54,697 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 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 21:12:54,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:12:54,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:54,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139886452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:54,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:54,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 21:12:54,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595527419] [2021-06-05 21:12:54,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:12:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:12:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:12:55,000 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:56,249 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-06-05 21:12:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:12:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:56,313 INFO L225 Difference]: With dead ends: 54084 [2021-06-05 21:12:56,313 INFO L226 Difference]: Without dead ends: 54013 [2021-06-05 21:12:56,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 687.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:12:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-06-05 21:12:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-06-05 21:12:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-06-05 21:12:56,954 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-06-05 21:12:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:56,954 INFO L482 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-06-05 21:12:56,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-06-05 21:12:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:57,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:57,209 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:57,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 21:12:57,410 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash 29410071, now seen corresponding path program 130 times [2021-06-05 21:12:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562504704] [2021-06-05 21:12:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:57,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:57,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562504704] [2021-06-05 21:12:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562504704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:57,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367294819] [2021-06-05 21:12:57,532 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 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 21:12:57,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:57,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:12:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367294819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:57,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:57,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 21:12:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471020965] [2021-06-05 21:12:57,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:12:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:12:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:12:57,793 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:58,399 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-06-05 21:12:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:12:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:12:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:58,479 INFO L225 Difference]: With dead ends: 57178 [2021-06-05 21:12:58,479 INFO L226 Difference]: Without dead ends: 57113 [2021-06-05 21:12:58,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:12:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-06-05 21:12:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-06-05 21:12:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-06-05 21:12:59,333 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-06-05 21:12:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:59,333 INFO L482 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-06-05 21:12:59,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-06-05 21:12:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:12:59,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:59,364 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:59,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:59,565 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1499834081, now seen corresponding path program 131 times [2021-06-05 21:12:59,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:59,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390839031] [2021-06-05 21:12:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:59,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390839031] [2021-06-05 21:12:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390839031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559347051] [2021-06-05 21:12:59,678 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 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 21:12:59,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:12:59,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:12:59,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559347051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:59,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:59,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:12:59,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315450050] [2021-06-05 21:12:59,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:12:59,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:12:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:59,935 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:00,657 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-06-05 21:13:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:00,735 INFO L225 Difference]: With dead ends: 54729 [2021-06-05 21:13:00,735 INFO L226 Difference]: Without dead ends: 54629 [2021-06-05 21:13:00,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 536.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:13:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-06-05 21:13:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-06-05 21:13:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-06-05 21:13:01,583 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-06-05 21:13:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:01,583 INFO L482 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-06-05 21:13:01,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-06-05 21:13:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:01,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:01,616 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:01,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:01,816 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash -367050537, now seen corresponding path program 132 times [2021-06-05 21:13:01,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:01,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154562748] [2021-06-05 21:13:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:01,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154562748] [2021-06-05 21:13:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154562748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:01,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808545849] [2021-06-05 21:13:01,928 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 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 21:13:01,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:13:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808545849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 21:13:02,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461776054] [2021-06-05 21:13:02,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:13:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:13:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:02,163 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:02,916 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-06-05 21:13:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:13:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:02,988 INFO L225 Difference]: With dead ends: 56271 [2021-06-05 21:13:02,989 INFO L226 Difference]: Without dead ends: 56195 [2021-06-05 21:13:02,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:13:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-06-05 21:13:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-06-05 21:13:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-06-05 21:13:03,690 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-06-05 21:13:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:03,690 INFO L482 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-06-05 21:13:03,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-06-05 21:13:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:03,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:03,722 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:03,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:03,923 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash 835986527, now seen corresponding path program 133 times [2021-06-05 21:13:03,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:03,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183372694] [2021-06-05 21:13:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:04,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:04,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183372694] [2021-06-05 21:13:04,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183372694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:04,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512907292] [2021-06-05 21:13:04,256 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 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 21:13:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:04,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512907292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:04,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:04,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-05 21:13:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586757676] [2021-06-05 21:13:04,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:13:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:13:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:04,508 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:05,015 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-06-05 21:13:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:13:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:05,083 INFO L225 Difference]: With dead ends: 56394 [2021-06-05 21:13:05,083 INFO L226 Difference]: Without dead ends: 56355 [2021-06-05 21:13:05,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:13:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-06-05 21:13:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-06-05 21:13:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-06-05 21:13:05,996 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-06-05 21:13:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:05,996 INFO L482 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-06-05 21:13:05,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-06-05 21:13:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:06,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:06,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:06,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:06,229 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1067721981, now seen corresponding path program 134 times [2021-06-05 21:13:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:06,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786347060] [2021-06-05 21:13:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:06,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786347060] [2021-06-05 21:13:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786347060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809306307] [2021-06-05 21:13:06,356 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 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 21:13:06,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:06,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809306307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:06,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:13:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16182724] [2021-06-05 21:13:06,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:13:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:13:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:13:06,595 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:07,280 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-06-05 21:13:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:07,348 INFO L225 Difference]: With dead ends: 57019 [2021-06-05 21:13:07,348 INFO L226 Difference]: Without dead ends: 56955 [2021-06-05 21:13:07,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:13:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-06-05 21:13:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-06-05 21:13:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-06-05 21:13:08,227 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-06-05 21:13:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:08,227 INFO L482 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-06-05 21:13:08,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-06-05 21:13:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:08,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:08,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:08,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 21:13:08,462 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash -171286659, now seen corresponding path program 135 times [2021-06-05 21:13:08,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:08,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799127128] [2021-06-05 21:13:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:08,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:08,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799127128] [2021-06-05 21:13:08,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799127128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:08,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60307916] [2021-06-05 21:13:08,578 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 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 21:13:08,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:13:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:08,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60307916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:08,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:08,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 21:13:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281031070] [2021-06-05 21:13:08,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:13:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:08,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:13:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:13:08,833 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:09,582 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-06-05 21:13:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:09,856 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-06-05 21:13:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:13:09,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:09,937 INFO L225 Difference]: With dead ends: 59486 [2021-06-05 21:13:09,937 INFO L226 Difference]: Without dead ends: 59421 [2021-06-05 21:13:09,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-06-05 21:13:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-06-05 21:13:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-06-05 21:13:10,970 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-06-05 21:13:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:10,970 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-06-05 21:13:10,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-06-05 21:13:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:11,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:11,003 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:11,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 21:13:11,204 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2020553339, now seen corresponding path program 136 times [2021-06-05 21:13:11,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:11,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525741429] [2021-06-05 21:13:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:11,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:11,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525741429] [2021-06-05 21:13:11,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525741429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:11,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145395395] [2021-06-05 21:13:11,332 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 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 21:13:11,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145395395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:11,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:11,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 21:13:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194243539] [2021-06-05 21:13:11,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:13:11,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:13:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:13:11,584 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:12,090 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-06-05 21:13:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:12,161 INFO L225 Difference]: With dead ends: 56537 [2021-06-05 21:13:12,161 INFO L226 Difference]: Without dead ends: 56480 [2021-06-05 21:13:12,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:13:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-06-05 21:13:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-06-05 21:13:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-06-05 21:13:13,018 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-06-05 21:13:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:13,019 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-06-05 21:13:13,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-06-05 21:13:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:13,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:13,051 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:13,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 21:13:13,252 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 442232079, now seen corresponding path program 137 times [2021-06-05 21:13:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522656876] [2021-06-05 21:13:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:13,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522656876] [2021-06-05 21:13:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522656876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176050445] [2021-06-05 21:13:13,394 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 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 21:13:13,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:13:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:13,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176050445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:13,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:13,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 21:13:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574255752] [2021-06-05 21:13:13,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:13:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:13:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:13:13,649 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:14,177 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-06-05 21:13:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:13:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:14,251 INFO L225 Difference]: With dead ends: 56317 [2021-06-05 21:13:14,251 INFO L226 Difference]: Without dead ends: 56270 [2021-06-05 21:13:14,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-06-05 21:13:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-06-05 21:13:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-06-05 21:13:15,134 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-06-05 21:13:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:15,134 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-06-05 21:13:15,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-06-05 21:13:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:15,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:15,168 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:15,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:13:15,369 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1041263967, now seen corresponding path program 138 times [2021-06-05 21:13:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:15,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840034955] [2021-06-05 21:13:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:15,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840034955] [2021-06-05 21:13:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840034955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29652148] [2021-06-05 21:13:15,501 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 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 21:13:15,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:13:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:15,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:15,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29652148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:15,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:15,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 21:13:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716758481] [2021-06-05 21:13:15,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:13:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:13:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:13:15,781 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:17,046 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-06-05 21:13:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:13:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:17,123 INFO L225 Difference]: With dead ends: 61301 [2021-06-05 21:13:17,123 INFO L226 Difference]: Without dead ends: 61234 [2021-06-05 21:13:17,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:13:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-06-05 21:13:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-06-05 21:13:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-06-05 21:13:18,082 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-06-05 21:13:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,082 INFO L482 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-06-05 21:13:18,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-06-05 21:13:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 21:13:18,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,118 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:18,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 21:13:18,319 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash 863946971, now seen corresponding path program 139 times [2021-06-05 21:13:18,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:18,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420509326] [2021-06-05 21:13:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:18,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420509326] [2021-06-05 21:13:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420509326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789686732] [2021-06-05 21:13:18,467 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 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 21:13:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:18,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789686732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:18,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 21:13:18,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104470214] [2021-06-05 21:13:18,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:13:18,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:13:18,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:18,689 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:19,337 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-06-05 21:13:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:13:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 21:13:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:19,422 INFO L225 Difference]: With dead ends: 56362 [2021-06-05 21:13:19,423 INFO L226 Difference]: Without dead ends: 56322 [2021-06-05 21:13:19,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-06-05 21:13:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-06-05 21:13:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-06-05 21:13:20,334 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-06-05 21:13:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,334 INFO L482 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-06-05 21:13:20,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-06-05 21:13:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 21:13:20,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,367 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:20,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:20,568 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,569 INFO L82 PathProgramCache]: Analyzing trace with hash -395845787, now seen corresponding path program 8 times [2021-06-05 21:13:20,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411654408] [2021-06-05 21:13:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:20,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411654408] [2021-06-05 21:13:20,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411654408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543376460] [2021-06-05 21:13:20,630 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 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 21:13:20,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:20,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:13:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:20,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543376460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:20,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:13:20,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446270549] [2021-06-05 21:13:20,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:20,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:20,731 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 21:13:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:21,022 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-06-05 21:13:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 21:13:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:21,099 INFO L225 Difference]: With dead ends: 59240 [2021-06-05 21:13:21,099 INFO L226 Difference]: Without dead ends: 59240 [2021-06-05 21:13:21,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:13:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-06-05 21:13:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-06-05 21:13:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-06-05 21:13:22,120 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-06-05 21:13:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,120 INFO L482 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-06-05 21:13:22,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 21:13:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-06-05 21:13:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:22,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,152 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:22,353 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 624773514, now seen corresponding path program 140 times [2021-06-05 21:13:22,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826723899] [2021-06-05 21:13:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826723899] [2021-06-05 21:13:22,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826723899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725827207] [2021-06-05 21:13:22,570 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 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 21:13:22,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:22,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:22,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725827207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:22,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:13:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479850109] [2021-06-05 21:13:22,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:13:22,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:13:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:22,894 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:24,060 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-06-05 21:13:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:13:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:24,133 INFO L225 Difference]: With dead ends: 57581 [2021-06-05 21:13:24,133 INFO L226 Difference]: Without dead ends: 57564 [2021-06-05 21:13:24,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:13:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-06-05 21:13:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-06-05 21:13:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-06-05 21:13:25,103 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-06-05 21:13:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:25,103 INFO L482 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-06-05 21:13:25,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-06-05 21:13:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:25,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:25,140 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:25,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,340 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506898, now seen corresponding path program 141 times [2021-06-05 21:13:25,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:25,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837590002] [2021-06-05 21:13:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:25,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837590002] [2021-06-05 21:13:25,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837590002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074585747] [2021-06-05 21:13:25,535 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 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 21:13:25,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:13:25,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074585747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:13:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103862597] [2021-06-05 21:13:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:13:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:13:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:13:25,931 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:27,979 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-06-05 21:13:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:13:27,979 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:28,057 INFO L225 Difference]: With dead ends: 64602 [2021-06-05 21:13:28,057 INFO L226 Difference]: Without dead ends: 64568 [2021-06-05 21:13:28,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 876.0ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:13:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-06-05 21:13:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-06-05 21:13:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-06-05 21:13:29,142 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-06-05 21:13:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-06-05 21:13:29,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-06-05 21:13:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:29,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:29,177 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forcibly destroying the process [2021-06-05 21:13:29,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,378 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1948613002, now seen corresponding path program 142 times [2021-06-05 21:13:29,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:29,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961376887] [2021-06-05 21:13:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:29,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961376887] [2021-06-05 21:13:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961376887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356490492] [2021-06-05 21:13:29,573 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 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 21:13:29,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:29,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356490492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:29,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:13:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141794893] [2021-06-05 21:13:29,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:13:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:13:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:29,911 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,037 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-06-05 21:13:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:13:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,118 INFO L225 Difference]: With dead ends: 61117 [2021-06-05 21:13:31,118 INFO L226 Difference]: Without dead ends: 61100 [2021-06-05 21:13:31,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 761.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:13:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-06-05 21:13:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-06-05 21:13:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-06-05 21:13:32,055 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-06-05 21:13:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:32,055 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-06-05 21:13:32,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-06-05 21:13:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:32,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:32,088 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:32,289 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1247898286, now seen corresponding path program 143 times [2021-06-05 21:13:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792558930] [2021-06-05 21:13:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792558930] [2021-06-05 21:13:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792558930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490934686] [2021-06-05 21:13:32,479 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 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 21:13:32,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:13:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490934686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:33,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:33,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:13:33,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764393823] [2021-06-05 21:13:33,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:13:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:33,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:13:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:33,173 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:34,577 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-06-05 21:13:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:13:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:34,656 INFO L225 Difference]: With dead ends: 62141 [2021-06-05 21:13:34,656 INFO L226 Difference]: Without dead ends: 62124 [2021-06-05 21:13:34,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1018.5ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:13:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-06-05 21:13:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-06-05 21:13:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-06-05 21:13:35,592 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-06-05 21:13:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:35,592 INFO L482 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-06-05 21:13:35,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-06-05 21:13:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:35,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:35,628 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:35,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:35,829 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash 632835722, now seen corresponding path program 144 times [2021-06-05 21:13:35,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:35,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29912519] [2021-06-05 21:13:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29912519] [2021-06-05 21:13:36,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29912519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907896831] [2021-06-05 21:13:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:36,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:13:36,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:36,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907896831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:36,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 21:13:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867880970] [2021-06-05 21:13:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:13:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:13:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:13:36,512 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,399 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 21:13:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:38,255 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-06-05 21:13:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:13:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:38,345 INFO L225 Difference]: With dead ends: 67577 [2021-06-05 21:13:38,345 INFO L226 Difference]: Without dead ends: 67543 [2021-06-05 21:13:38,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1330.6ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:13:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-06-05 21:13:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-06-05 21:13:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-06-05 21:13:39,284 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-06-05 21:13:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:39,284 INFO L482 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-06-05 21:13:39,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-06-05 21:13:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:39,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:39,321 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:39,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,521 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash 592118866, now seen corresponding path program 145 times [2021-06-05 21:13:39,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:39,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987485196] [2021-06-05 21:13:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:39,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987485196] [2021-06-05 21:13:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987485196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13049720] [2021-06-05 21:13:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:40,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13049720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:13:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419025365] [2021-06-05 21:13:40,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:13:40,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:13:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:13:40,080 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:40,966 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-06-05 21:13:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:13:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:41,049 INFO L225 Difference]: With dead ends: 64664 [2021-06-05 21:13:41,049 INFO L226 Difference]: Without dead ends: 64630 [2021-06-05 21:13:41,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:13:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-06-05 21:13:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-06-05 21:13:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-06-05 21:13:42,062 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-06-05 21:13:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:42,062 INFO L482 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-06-05 21:13:42,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-06-05 21:13:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:42,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:42,097 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:42,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 21:13:42,297 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash 994599818, now seen corresponding path program 146 times [2021-06-05 21:13:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:42,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929358830] [2021-06-05 21:13:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:42,629 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 21:13:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:42,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929358830] [2021-06-05 21:13:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929358830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244609232] [2021-06-05 21:13:42,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:42,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244609232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:43,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:13:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194408512] [2021-06-05 21:13:43,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:13:43,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:13:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:43,387 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:44,373 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-06-05 21:13:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:13:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:44,456 INFO L225 Difference]: With dead ends: 65329 [2021-06-05 21:13:44,456 INFO L226 Difference]: Without dead ends: 65295 [2021-06-05 21:13:44,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1145.2ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:13:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-06-05 21:13:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-06-05 21:13:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-06-05 21:13:45,437 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-06-05 21:13:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:45,437 INFO L482 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-06-05 21:13:45,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-06-05 21:13:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:45,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:45,471 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:45,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,672 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 314707794, now seen corresponding path program 147 times [2021-06-05 21:13:45,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:45,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115519960] [2021-06-05 21:13:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115519960] [2021-06-05 21:13:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115519960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663344086] [2021-06-05 21:13:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:13:45,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663344086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:46,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:13:46,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809090823] [2021-06-05 21:13:46,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:13:46,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:13:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:13:46,256 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:47,761 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-06-05 21:13:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:13:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:47,860 INFO L225 Difference]: With dead ends: 75604 [2021-06-05 21:13:47,860 INFO L226 Difference]: Without dead ends: 75535 [2021-06-05 21:13:47,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:13:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-06-05 21:13:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-06-05 21:13:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-06-05 21:13:48,906 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-06-05 21:13:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-06-05 21:13:48,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-06-05 21:13:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:48,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:48,941 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:49,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 21:13:49,142 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1595616440, now seen corresponding path program 148 times [2021-06-05 21:13:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799356427] [2021-06-05 21:13:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799356427] [2021-06-05 21:13:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799356427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457287377] [2021-06-05 21:13:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:49,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:49,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457287377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:49,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:13:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014164049] [2021-06-05 21:13:49,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:13:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:49,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:13:49,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:49,680 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:51,006 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-06-05 21:13:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:13:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:51,089 INFO L225 Difference]: With dead ends: 70952 [2021-06-05 21:13:51,089 INFO L226 Difference]: Without dead ends: 70935 [2021-06-05 21:13:51,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:13:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-06-05 21:13:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-06-05 21:13:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-06-05 21:13:52,213 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-06-05 21:13:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:52,213 INFO L482 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-06-05 21:13:52,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-06-05 21:13:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:52,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:52,250 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:52,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,451 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash -839131036, now seen corresponding path program 149 times [2021-06-05 21:13:52,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:52,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913608856] [2021-06-05 21:13:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913608856] [2021-06-05 21:13:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913608856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242194834] [2021-06-05 21:13:52,657 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 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 21:13:52,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:13:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242194834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:13:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217993259] [2021-06-05 21:13:53,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:13:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:13:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:53,116 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:54,625 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-06-05 21:13:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:13:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:54,719 INFO L225 Difference]: With dead ends: 71720 [2021-06-05 21:13:54,719 INFO L226 Difference]: Without dead ends: 71703 [2021-06-05 21:13:54,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 991.9ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:13:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-06-05 21:13:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-06-05 21:13:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-06-05 21:13:55,860 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-06-05 21:13:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:55,860 INFO L482 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-06-05 21:13:55,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-06-05 21:13:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:55,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:55,898 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:56,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 21:13:56,099 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2116521804, now seen corresponding path program 150 times [2021-06-05 21:13:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:56,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785818165] [2021-06-05 21:13:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:56,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785818165] [2021-06-05 21:13:56,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785818165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729558114] [2021-06-05 21:13:56,316 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 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 21:13:56,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:13:56,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:13:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:56,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729558114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:56,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:13:56,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444093102] [2021-06-05 21:13:56,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:13:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:13:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:13:56,724 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:58,601 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-06-05 21:13:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:13:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:13:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:58,692 INFO L225 Difference]: With dead ends: 79207 [2021-06-05 21:13:58,692 INFO L226 Difference]: Without dead ends: 79173 [2021-06-05 21:13:58,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:13:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-06-05 21:13:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-06-05 21:13:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-06-05 21:13:59,854 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-06-05 21:13:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-06-05 21:13:59,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-06-05 21:13:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:13:59,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:59,891 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:00,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,092 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1018065796, now seen corresponding path program 151 times [2021-06-05 21:14:00,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:00,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393877308] [2021-06-05 21:14:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:00,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393877308] [2021-06-05 21:14:00,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393877308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913222442] [2021-06-05 21:14:00,337 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 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 21:14:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:00,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913222442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:00,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098610] [2021-06-05 21:14:00,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:00,695 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:01,716 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-06-05 21:14:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:02,085 INFO L225 Difference]: With dead ends: 74738 [2021-06-05 21:14:02,086 INFO L226 Difference]: Without dead ends: 74721 [2021-06-05 21:14:02,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 810.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:14:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-06-05 21:14:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-06-05 21:14:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-06-05 21:14:03,234 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-06-05 21:14:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:03,234 INFO L482 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-06-05 21:14:03,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-06-05 21:14:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:03,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:03,270 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:03,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,471 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash 862668212, now seen corresponding path program 152 times [2021-06-05 21:14:03,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:03,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737821750] [2021-06-05 21:14:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:03,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737821750] [2021-06-05 21:14:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737821750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447078885] [2021-06-05 21:14:03,681 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 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 21:14:03,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:04,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447078885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:04,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:04,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:04,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754239557] [2021-06-05 21:14:04,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:04,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:04,037 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:05,319 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-06-05 21:14:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:14:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:05,420 INFO L225 Difference]: With dead ends: 78636 [2021-06-05 21:14:05,420 INFO L226 Difference]: Without dead ends: 78602 [2021-06-05 21:14:05,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 911.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:14:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-06-05 21:14:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-06-05 21:14:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-06-05 21:14:06,931 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-06-05 21:14:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:06,931 INFO L482 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-06-05 21:14:06,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-06-05 21:14:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:06,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:06,969 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:07,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:07,169 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash 821951356, now seen corresponding path program 153 times [2021-06-05 21:14:07,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:07,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45343924] [2021-06-05 21:14:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:07,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:07,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45343924] [2021-06-05 21:14:07,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45343924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:07,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278251330] [2021-06-05 21:14:07,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:07,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:14:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:07,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278251330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:07,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:07,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:14:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125650890] [2021-06-05 21:14:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:14:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:14:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:14:07,753 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:09,816 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-06-05 21:14:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:14:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:09,919 INFO L225 Difference]: With dead ends: 84081 [2021-06-05 21:14:09,919 INFO L226 Difference]: Without dead ends: 84034 [2021-06-05 21:14:09,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 931.6ms TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:14:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-06-05 21:14:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-06-05 21:14:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-06-05 21:14:11,076 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-06-05 21:14:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:11,076 INFO L482 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-06-05 21:14:11,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-06-05 21:14:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:11,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:11,114 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:11,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:11,314 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1224432308, now seen corresponding path program 154 times [2021-06-05 21:14:11,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:11,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098366135] [2021-06-05 21:14:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:11,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:11,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098366135] [2021-06-05 21:14:11,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098366135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:11,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142767714] [2021-06-05 21:14:11,538 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 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 21:14:11,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142767714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:11,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:14:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409824205] [2021-06-05 21:14:11,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:14:11,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:14:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:14:11,962 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:12,948 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-06-05 21:14:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:14:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:13,043 INFO L225 Difference]: With dead ends: 79146 [2021-06-05 21:14:13,043 INFO L226 Difference]: Without dead ends: 79112 [2021-06-05 21:14:13,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 772.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:14:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-06-05 21:14:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-06-05 21:14:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-06-05 21:14:14,516 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-06-05 21:14:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:14,516 INFO L482 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-06-05 21:14:14,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-06-05 21:14:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:14,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:14,551 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:14,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 21:14:14,752 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash -722916894, now seen corresponding path program 155 times [2021-06-05 21:14:14,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:14,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264512520] [2021-06-05 21:14:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264512520] [2021-06-05 21:14:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264512520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222446972] [2021-06-05 21:14:14,954 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 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 21:14:14,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:14:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222446972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:15,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:15,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:14:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754850825] [2021-06-05 21:14:15,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:14:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:14:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:14:15,345 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:16,438 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-06-05 21:14:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:14:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:16,550 INFO L225 Difference]: With dead ends: 87645 [2021-06-05 21:14:16,550 INFO L226 Difference]: Without dead ends: 87602 [2021-06-05 21:14:16,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:14:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-06-05 21:14:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-06-05 21:14:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-06-05 21:14:18,146 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-06-05 21:14:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:18,146 INFO L482 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-06-05 21:14:18,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-06-05 21:14:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:18,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:18,179 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:18,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:14:18,379 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:18,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1402578930, now seen corresponding path program 156 times [2021-06-05 21:14:18,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:18,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773919679] [2021-06-05 21:14:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:18,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:18,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773919679] [2021-06-05 21:14:18,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773919679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:18,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453260112] [2021-06-05 21:14:18,565 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 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 21:14:18,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:14:18,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:18,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:18,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:18,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453260112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:18,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:18,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:18,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967069014] [2021-06-05 21:14:18,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:18,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:18,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:18,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:18,887 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:20,110 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-06-05 21:14:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:14:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:20,500 INFO L225 Difference]: With dead ends: 87816 [2021-06-05 21:14:20,500 INFO L226 Difference]: Without dead ends: 87799 [2021-06-05 21:14:20,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:14:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-06-05 21:14:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-06-05 21:14:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-06-05 21:14:21,799 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-06-05 21:14:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:21,799 INFO L482 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-06-05 21:14:21,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-06-05 21:14:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:21,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:21,839 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:22,040 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1044575176, now seen corresponding path program 157 times [2021-06-05 21:14:22,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:22,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141637170] [2021-06-05 21:14:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:22,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141637170] [2021-06-05 21:14:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141637170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474692727] [2021-06-05 21:14:22,232 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 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 21:14:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:22,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474692727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:22,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:22,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632791880] [2021-06-05 21:14:22,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:22,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:22,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:22,556 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:23,643 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-06-05 21:14:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:24,055 INFO L225 Difference]: With dead ends: 86430 [2021-06-05 21:14:24,055 INFO L226 Difference]: Without dead ends: 86413 [2021-06-05 21:14:24,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 744.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:14:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-06-05 21:14:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-06-05 21:14:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-06-05 21:14:25,314 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-06-05 21:14:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:25,315 INFO L482 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-06-05 21:14:25,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-06-05 21:14:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:25,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:25,353 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:25,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 21:14:25,553 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1825448930, now seen corresponding path program 158 times [2021-06-05 21:14:25,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:25,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849032484] [2021-06-05 21:14:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:25,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:25,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849032484] [2021-06-05 21:14:25,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849032484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841536785] [2021-06-05 21:14:25,739 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 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 21:14:25,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:25,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:25,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:26,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841536785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:26,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:26,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:26,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204699397] [2021-06-05 21:14:26,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:26,130 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:27,121 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-06-05 21:14:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:27,509 INFO L225 Difference]: With dead ends: 86926 [2021-06-05 21:14:27,509 INFO L226 Difference]: Without dead ends: 86909 [2021-06-05 21:14:27,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:14:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-06-05 21:14:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-06-05 21:14:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-06-05 21:14:28,796 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-06-05 21:14:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:28,796 INFO L482 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-06-05 21:14:28,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-06-05 21:14:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:28,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:28,837 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:29,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 21:14:29,038 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 144907922, now seen corresponding path program 159 times [2021-06-05 21:14:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:29,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767211348] [2021-06-05 21:14:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767211348] [2021-06-05 21:14:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767211348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520641643] [2021-06-05 21:14:29,239 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 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 21:14:29,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:14:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520641643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:29,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 21:14:29,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746234001] [2021-06-05 21:14:29,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:14:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:14:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:14:29,733 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:31,728 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-06-05 21:14:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:14:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:31,844 INFO L225 Difference]: With dead ends: 91083 [2021-06-05 21:14:31,844 INFO L226 Difference]: Without dead ends: 91049 [2021-06-05 21:14:31,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:14:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-06-05 21:14:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-06-05 21:14:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-06-05 21:14:33,103 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-06-05 21:14:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:33,103 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-06-05 21:14:33,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-06-05 21:14:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:33,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:33,145 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:33,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 21:14:33,346 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:33,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1243363930, now seen corresponding path program 160 times [2021-06-05 21:14:33,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:33,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048483361] [2021-06-05 21:14:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:33,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:33,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048483361] [2021-06-05 21:14:33,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048483361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514606459] [2021-06-05 21:14:33,539 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 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 21:14:33,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:33,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514606459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:33,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:33,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102070656] [2021-06-05 21:14:33,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:33,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:33,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:33,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:33,876 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:35,184 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-06-05 21:14:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:14:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:35,295 INFO L225 Difference]: With dead ends: 88810 [2021-06-05 21:14:35,295 INFO L226 Difference]: Without dead ends: 88793 [2021-06-05 21:14:35,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 949.1ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:14:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-06-05 21:14:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-06-05 21:14:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-06-05 21:14:36,617 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-06-05 21:14:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:36,618 INFO L482 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-06-05 21:14:36,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-06-05 21:14:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:36,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:36,657 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:36,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:36,857 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1170869358, now seen corresponding path program 161 times [2021-06-05 21:14:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:36,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111779213] [2021-06-05 21:14:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:37,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111779213] [2021-06-05 21:14:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111779213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667389062] [2021-06-05 21:14:37,051 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 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 21:14:37,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:14:37,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:37,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667389062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:37,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:14:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455891612] [2021-06-05 21:14:37,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:14:37,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:14:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:14:37,539 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:39,776 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-06-05 21:14:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:14:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:39,904 INFO L225 Difference]: With dead ends: 94594 [2021-06-05 21:14:39,904 INFO L226 Difference]: Without dead ends: 94560 [2021-06-05 21:14:39,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:14:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-06-05 21:14:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-06-05 21:14:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-06-05 21:14:41,561 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-06-05 21:14:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:41,561 INFO L482 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-06-05 21:14:41,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-06-05 21:14:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:41,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:41,604 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:41,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 21:14:41,809 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1211586214, now seen corresponding path program 162 times [2021-06-05 21:14:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:41,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442977467] [2021-06-05 21:14:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:41,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442977467] [2021-06-05 21:14:41,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442977467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384508362] [2021-06-05 21:14:41,998 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 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 21:14:42,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:14:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384508362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:42,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:42,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 21:14:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616564961] [2021-06-05 21:14:42,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:14:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:14:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:14:42,490 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:44,662 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-06-05 21:14:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:14:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:44,772 INFO L225 Difference]: With dead ends: 95030 [2021-06-05 21:14:44,772 INFO L226 Difference]: Without dead ends: 94996 [2021-06-05 21:14:44,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1361.0ms TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:14:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-06-05 21:14:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-06-05 21:14:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-06-05 21:14:46,058 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-06-05 21:14:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:46,058 INFO L482 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-06-05 21:14:46,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-06-05 21:14:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:46,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:46,097 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:46,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:46,297 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash -809105262, now seen corresponding path program 163 times [2021-06-05 21:14:46,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:46,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656667598] [2021-06-05 21:14:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:46,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656667598] [2021-06-05 21:14:46,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656667598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600109064] [2021-06-05 21:14:46,483 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 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 21:14:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:46,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600109064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:46,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:14:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078838179] [2021-06-05 21:14:46,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:14:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:14:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:14:46,865 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:48,296 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-06-05 21:14:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:14:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:48,417 INFO L225 Difference]: With dead ends: 91387 [2021-06-05 21:14:48,418 INFO L226 Difference]: Without dead ends: 91353 [2021-06-05 21:14:48,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:14:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-06-05 21:14:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-06-05 21:14:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-06-05 21:14:49,765 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-06-05 21:14:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:49,765 INFO L482 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-06-05 21:14:49,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-06-05 21:14:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:49,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:49,807 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:50,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:50,008 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1488997286, now seen corresponding path program 164 times [2021-06-05 21:14:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147266787] [2021-06-05 21:14:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:50,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147266787] [2021-06-05 21:14:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147266787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190417381] [2021-06-05 21:14:50,234 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 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 21:14:50,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:50,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:50,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190417381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:50,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:50,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:14:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240478729] [2021-06-05 21:14:50,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:14:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:14:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:14:50,640 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:52,119 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-06-05 21:14:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:14:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:52,246 INFO L225 Difference]: With dead ends: 96202 [2021-06-05 21:14:52,246 INFO L226 Difference]: Without dead ends: 96159 [2021-06-05 21:14:52,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:14:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-06-05 21:14:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-06-05 21:14:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-06-05 21:14:53,654 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-06-05 21:14:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:53,654 INFO L482 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-06-05 21:14:53,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-06-05 21:14:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:53,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:53,697 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:53,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:53,898 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash 858850796, now seen corresponding path program 165 times [2021-06-05 21:14:53,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:53,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866447711] [2021-06-05 21:14:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:54,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:54,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866447711] [2021-06-05 21:14:54,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866447711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881081792] [2021-06-05 21:14:54,116 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 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 21:14:54,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:14:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:54,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881081792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:54,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010693879] [2021-06-05 21:14:54,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:54,758 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:55,797 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-06-05 21:14:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:55,922 INFO L225 Difference]: With dead ends: 94378 [2021-06-05 21:14:55,922 INFO L226 Difference]: Without dead ends: 94361 [2021-06-05 21:14:55,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:14:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-06-05 21:14:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-06-05 21:14:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-06-05 21:14:57,301 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-06-05 21:14:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:57,302 INFO L482 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-06-05 21:14:57,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-06-05 21:14:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:14:57,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:57,344 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:57,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:57,545 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:57,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1216854550, now seen corresponding path program 166 times [2021-06-05 21:14:57,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:57,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649834809] [2021-06-05 21:14:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:57,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649834809] [2021-06-05 21:14:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649834809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563389007] [2021-06-05 21:14:57,750 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 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 21:14:58,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:14:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:58,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563389007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:58,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:58,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:14:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126102431] [2021-06-05 21:14:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:14:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:14:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:58,326 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:59,395 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-06-05 21:14:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:14:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:14:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:59,520 INFO L225 Difference]: With dead ends: 94858 [2021-06-05 21:14:59,520 INFO L226 Difference]: Without dead ends: 94841 [2021-06-05 21:14:59,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:14:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-06-05 21:15:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-06-05 21:15:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-06-05 21:15:00,972 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-06-05 21:15:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:00,972 INFO L482 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-06-05 21:15:00,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-06-05 21:15:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:01,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:01,247 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:01,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 21:15:01,461 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash -208088640, now seen corresponding path program 167 times [2021-06-05 21:15:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:01,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213253753] [2021-06-05 21:15:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:01,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213253753] [2021-06-05 21:15:01,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213253753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182681996] [2021-06-05 21:15:01,659 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 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 21:15:01,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:15:01,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:01,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:01,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182681996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:02,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:02,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:15:02,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284610228] [2021-06-05 21:15:02,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:15:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:15:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:15:02,243 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:03,710 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-06-05 21:15:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:15:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:03,850 INFO L225 Difference]: With dead ends: 95875 [2021-06-05 21:15:03,850 INFO L226 Difference]: Without dead ends: 95858 [2021-06-05 21:15:03,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1093.9ms TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:15:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-06-05 21:15:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-06-05 21:15:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-06-05 21:15:05,658 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-06-05 21:15:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:05,658 INFO L482 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-06-05 21:15:05,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-06-05 21:15:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:05,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:05,705 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:05,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 21:15:05,921 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1703774524, now seen corresponding path program 168 times [2021-06-05 21:15:05,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:05,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81267210] [2021-06-05 21:15:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:06,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81267210] [2021-06-05 21:15:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81267210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400343140] [2021-06-05 21:15:06,126 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 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 21:15:06,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:15:06,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:06,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400343140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:06,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:06,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:15:06,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252080561] [2021-06-05 21:15:06,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:15:06,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:15:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:15:06,567 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:08,528 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-06-05 21:15:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:15:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:08,683 INFO L225 Difference]: With dead ends: 102468 [2021-06-05 21:15:08,683 INFO L226 Difference]: Without dead ends: 102434 [2021-06-05 21:15:08,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 904.5ms TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:15:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-06-05 21:15:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-06-05 21:15:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-06-05 21:15:10,286 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-06-05 21:15:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:10,286 INFO L482 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-06-05 21:15:10,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-06-05 21:15:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:10,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:10,332 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:10,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 21:15:10,533 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash -710458764, now seen corresponding path program 169 times [2021-06-05 21:15:10,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:10,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142710021] [2021-06-05 21:15:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:10,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:10,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142710021] [2021-06-05 21:15:10,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142710021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:10,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540375201] [2021-06-05 21:15:10,789 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 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 21:15:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:11,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540375201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:11,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:11,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:15:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786175557] [2021-06-05 21:15:11,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:15:11,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:15:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:15:11,158 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:12,772 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-06-05 21:15:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:15:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:12,911 INFO L225 Difference]: With dead ends: 98052 [2021-06-05 21:15:12,911 INFO L226 Difference]: Without dead ends: 98018 [2021-06-05 21:15:12,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:15:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-06-05 21:15:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-06-05 21:15:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-06-05 21:15:14,457 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-06-05 21:15:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:14,457 INFO L482 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-06-05 21:15:14,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-06-05 21:15:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:14,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:14,508 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:14,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:14,713 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash -751175620, now seen corresponding path program 170 times [2021-06-05 21:15:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806945732] [2021-06-05 21:15:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:14,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:14,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806945732] [2021-06-05 21:15:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806945732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:14,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038632522] [2021-06-05 21:15:14,900 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 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 21:15:14,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:14,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:15,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038632522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:15,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:15,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:15:15,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244899761] [2021-06-05 21:15:15,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:15:15,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:15:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:15:15,630 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:16,770 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-06-05 21:15:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:15:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:16,895 INFO L225 Difference]: With dead ends: 97953 [2021-06-05 21:15:16,895 INFO L226 Difference]: Without dead ends: 97919 [2021-06-05 21:15:16,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1105.1ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:15:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-06-05 21:15:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-06-05 21:15:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-06-05 21:15:18,365 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-06-05 21:15:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:18,365 INFO L482 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-06-05 21:15:18,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-06-05 21:15:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:18,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:18,797 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:19,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:19,013 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1028586692, now seen corresponding path program 171 times [2021-06-05 21:15:19,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:19,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264159459] [2021-06-05 21:15:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:19,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264159459] [2021-06-05 21:15:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264159459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26315051] [2021-06-05 21:15:19,199 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 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 21:15:19,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:15:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:19,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:19,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26315051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:19,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:19,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:15:19,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590309058] [2021-06-05 21:15:19,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:15:19,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:15:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:15:19,600 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:21,220 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-06-05 21:15:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:15:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:21,373 INFO L225 Difference]: With dead ends: 107624 [2021-06-05 21:15:21,373 INFO L226 Difference]: Without dead ends: 107555 [2021-06-05 21:15:21,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 951.9ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:15:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-06-05 21:15:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-06-05 21:15:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-06-05 21:15:23,209 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-06-05 21:15:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:23,209 INFO L482 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-06-05 21:15:23,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-06-05 21:15:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:23,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:23,253 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:23,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:23,454 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 938145336, now seen corresponding path program 172 times [2021-06-05 21:15:23,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:23,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353829660] [2021-06-05 21:15:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353829660] [2021-06-05 21:15:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353829660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373985395] [2021-06-05 21:15:23,639 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 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 21:15:23,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:23,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373985395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:24,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:24,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:15:24,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131107818] [2021-06-05 21:15:24,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:15:24,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:15:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:15:24,033 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:25,798 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-06-05 21:15:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:15:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:25,948 INFO L225 Difference]: With dead ends: 105337 [2021-06-05 21:15:25,949 INFO L226 Difference]: Without dead ends: 105303 [2021-06-05 21:15:25,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 891.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:15:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-06-05 21:15:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-06-05 21:15:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-06-05 21:15:27,624 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-06-05 21:15:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:27,624 INFO L482 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-06-05 21:15:27,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-06-05 21:15:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:27,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:27,667 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:27,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:27,867 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261390, now seen corresponding path program 173 times [2021-06-05 21:15:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:27,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782108238] [2021-06-05 21:15:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:28,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:28,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782108238] [2021-06-05 21:15:28,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782108238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042760288] [2021-06-05 21:15:28,061 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 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 21:15:28,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:15:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042760288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:28,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:15:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591823049] [2021-06-05 21:15:28,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:15:28,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:28,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:15:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:15:28,953 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:30,995 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-06-05 21:15:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:15:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:31,177 INFO L225 Difference]: With dead ends: 106385 [2021-06-05 21:15:31,177 INFO L226 Difference]: Without dead ends: 106368 [2021-06-05 21:15:31,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1561.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:15:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-06-05 21:15:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-06-05 21:15:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-06-05 21:15:32,796 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-06-05 21:15:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:32,796 INFO L482 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-06-05 21:15:32,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-06-05 21:15:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:32,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:32,839 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:33,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:33,040 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1040789202, now seen corresponding path program 174 times [2021-06-05 21:15:33,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:33,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944034713] [2021-06-05 21:15:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:33,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:33,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944034713] [2021-06-05 21:15:33,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944034713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332164947] [2021-06-05 21:15:33,228 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 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 21:15:33,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:15:33,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:33,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:33,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332164947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:33,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:15:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383278937] [2021-06-05 21:15:33,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:15:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:15:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:15:33,630 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:35,578 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-06-05 21:15:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:15:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:35,754 INFO L225 Difference]: With dead ends: 113434 [2021-06-05 21:15:35,754 INFO L226 Difference]: Without dead ends: 113400 [2021-06-05 21:15:35,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 923.0ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:15:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-06-05 21:15:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-06-05 21:15:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-06-05 21:15:38,012 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-06-05 21:15:38,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:38,012 INFO L482 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-06-05 21:15:38,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-06-05 21:15:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:38,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:38,058 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:38,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:38,259 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1000072346, now seen corresponding path program 175 times [2021-06-05 21:15:38,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:38,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501054228] [2021-06-05 21:15:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:38,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:38,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501054228] [2021-06-05 21:15:38,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501054228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:38,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528279641] [2021-06-05 21:15:38,455 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 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 21:15:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528279641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:38,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:38,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:15:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776719719] [2021-06-05 21:15:38,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:15:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:15:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:15:38,808 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:40,053 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-06-05 21:15:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:15:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:40,218 INFO L225 Difference]: With dead ends: 107947 [2021-06-05 21:15:40,219 INFO L226 Difference]: Without dead ends: 107913 [2021-06-05 21:15:40,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:15:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-06-05 21:15:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-06-05 21:15:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-06-05 21:15:42,095 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-06-05 21:15:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:42,095 INFO L482 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-06-05 21:15:42,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-06-05 21:15:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:42,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:42,138 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:42,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:42,339 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553298, now seen corresponding path program 176 times [2021-06-05 21:15:42,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:42,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832054318] [2021-06-05 21:15:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:42,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832054318] [2021-06-05 21:15:42,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832054318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983125949] [2021-06-05 21:15:42,530 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 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 21:15:42,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983125949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:42,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:15:42,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507189547] [2021-06-05 21:15:42,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:15:42,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:15:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:15:42,906 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:44,532 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-06-05 21:15:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:15:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:44,692 INFO L225 Difference]: With dead ends: 108285 [2021-06-05 21:15:44,692 INFO L226 Difference]: Without dead ends: 108251 [2021-06-05 21:15:44,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:15:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-06-05 21:15:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-06-05 21:15:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-06-05 21:15:46,355 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-06-05 21:15:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:46,355 INFO L482 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-06-05 21:15:46,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-06-05 21:15:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:46,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:46,400 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:46,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:46,601 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 402638746, now seen corresponding path program 177 times [2021-06-05 21:15:46,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:46,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237770691] [2021-06-05 21:15:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:46,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237770691] [2021-06-05 21:15:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237770691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822996012] [2021-06-05 21:15:46,788 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 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 21:15:46,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:15:46,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:47,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822996012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:47,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:47,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:15:47,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854190809] [2021-06-05 21:15:47,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:15:47,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:15:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:15:47,600 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:49,113 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-06-05 21:15:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:15:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:49,301 INFO L225 Difference]: With dead ends: 113083 [2021-06-05 21:15:49,301 INFO L226 Difference]: Without dead ends: 113048 [2021-06-05 21:15:49,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1348.7ms TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:15:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-06-05 21:15:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-06-05 21:15:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-06-05 21:15:51,237 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-06-05 21:15:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:51,237 INFO L482 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-06-05 21:15:51,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-06-05 21:15:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:51,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:51,285 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:51,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:51,489 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322538, now seen corresponding path program 178 times [2021-06-05 21:15:51,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:51,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438113982] [2021-06-05 21:15:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:51,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438113982] [2021-06-05 21:15:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438113982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677848080] [2021-06-05 21:15:51,671 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 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 21:15:51,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:51,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:51,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677848080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:51,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:15:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141078584] [2021-06-05 21:15:51,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:15:51,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:15:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:15:51,988 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:53,314 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-06-05 21:15:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:15:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:53,481 INFO L225 Difference]: With dead ends: 113021 [2021-06-05 21:15:53,481 INFO L226 Difference]: Without dead ends: 112978 [2021-06-05 21:15:53,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:15:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-06-05 21:15:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-06-05 21:15:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-06-05 21:15:55,128 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-06-05 21:15:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:55,128 INFO L482 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-06-05 21:15:55,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-06-05 21:15:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:55,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:55,175 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:55,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 21:15:55,375 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1543995358, now seen corresponding path program 179 times [2021-06-05 21:15:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:55,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789326996] [2021-06-05 21:15:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:55,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:55,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789326996] [2021-06-05 21:15:55,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789326996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:55,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026615701] [2021-06-05 21:15:55,583 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 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 21:15:55,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:15:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:55,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:15:55,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026615701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:55,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:55,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:15:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298657644] [2021-06-05 21:15:55,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:15:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:15:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:15:55,936 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:56,400 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-06-05 21:15:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:57,303 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-06-05 21:15:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:15:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:15:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:57,464 INFO L225 Difference]: With dead ends: 113524 [2021-06-05 21:15:57,464 INFO L226 Difference]: Without dead ends: 113481 [2021-06-05 21:15:57,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1124.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:15:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-06-05 21:15:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-06-05 21:15:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-06-05 21:15:59,683 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-06-05 21:15:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:59,683 INFO L482 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-06-05 21:15:59,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-06-05 21:15:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:15:59,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:59,724 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:59,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:59,926 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476310, now seen corresponding path program 180 times [2021-06-05 21:15:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:59,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118910126] [2021-06-05 21:15:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:00,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:00,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118910126] [2021-06-05 21:16:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118910126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711959824] [2021-06-05 21:16:00,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:00,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:16:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:00,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711959824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:00,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:00,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:16:00,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129696780] [2021-06-05 21:16:00,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:16:00,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:16:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:16:00,523 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:01,856 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-06-05 21:16:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:16:01,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:02,368 INFO L225 Difference]: With dead ends: 122596 [2021-06-05 21:16:02,368 INFO L226 Difference]: Without dead ends: 122544 [2021-06-05 21:16:02,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:16:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-06-05 21:16:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-06-05 21:16:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-06-05 21:16:03,988 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-06-05 21:16:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:03,988 INFO L482 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-06-05 21:16:03,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-06-05 21:16:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:04,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:04,036 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:04,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 21:16:04,239 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash 220708932, now seen corresponding path program 181 times [2021-06-05 21:16:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:04,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036452611] [2021-06-05 21:16:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:04,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:04,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036452611] [2021-06-05 21:16:04,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036452611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:04,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590399246] [2021-06-05 21:16:04,465 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 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 21:16:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590399246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:04,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:04,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:16:04,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950632719] [2021-06-05 21:16:04,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:16:04,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:16:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:16:04,814 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:06,192 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-06-05 21:16:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:16:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:06,353 INFO L225 Difference]: With dead ends: 116567 [2021-06-05 21:16:06,353 INFO L226 Difference]: Without dead ends: 116541 [2021-06-05 21:16:06,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1031.1ms TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:16:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-06-05 21:16:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-06-05 21:16:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-06-05 21:16:08,679 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-06-05 21:16:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:08,679 INFO L482 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-06-05 21:16:08,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-06-05 21:16:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:08,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:08,718 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:08,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:08,927 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash 623189884, now seen corresponding path program 182 times [2021-06-05 21:16:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:08,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778549595] [2021-06-05 21:16:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:09,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:09,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778549595] [2021-06-05 21:16:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778549595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:09,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801460121] [2021-06-05 21:16:09,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:09,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:09,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801460121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:09,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:09,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:16:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209276194] [2021-06-05 21:16:09,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:16:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:16:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:16:09,502 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:10,786 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-06-05 21:16:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:16:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:10,963 INFO L225 Difference]: With dead ends: 120186 [2021-06-05 21:16:10,963 INFO L226 Difference]: Without dead ends: 120151 [2021-06-05 21:16:10,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:16:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-06-05 21:16:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-06-05 21:16:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-06-05 21:16:12,960 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-06-05 21:16:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:12,961 INFO L482 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-06-05 21:16:12,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-06-05 21:16:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:13,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:13,004 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:13,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:13,205 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash 538134874, now seen corresponding path program 183 times [2021-06-05 21:16:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:13,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177518609] [2021-06-05 21:16:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:13,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177518609] [2021-06-05 21:16:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177518609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873245828] [2021-06-05 21:16:13,393 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 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 21:16:13,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:16:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:13,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:13,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873245828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:13,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:13,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:16:13,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657425801] [2021-06-05 21:16:13,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:16:13,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:16:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:16:13,798 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:15,806 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-06-05 21:16:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:16:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:15,980 INFO L225 Difference]: With dead ends: 121717 [2021-06-05 21:16:15,981 INFO L226 Difference]: Without dead ends: 121674 [2021-06-05 21:16:15,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1255.7ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:16:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-06-05 21:16:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-06-05 21:16:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-06-05 21:16:18,069 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-06-05 21:16:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:18,069 INFO L482 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-06-05 21:16:18,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-06-05 21:16:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:18,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:18,113 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:18,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 21:16:18,314 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 300697604, now seen corresponding path program 184 times [2021-06-05 21:16:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:18,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102134120] [2021-06-05 21:16:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:18,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:18,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102134120] [2021-06-05 21:16:18,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102134120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190046203] [2021-06-05 21:16:18,508 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 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 21:16:18,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:18,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190046203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:18,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-05 21:16:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587469356] [2021-06-05 21:16:18,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:16:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:16:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:16:18,886 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:20,269 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-06-05 21:16:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:16:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:20,449 INFO L225 Difference]: With dead ends: 124683 [2021-06-05 21:16:20,449 INFO L226 Difference]: Without dead ends: 124640 [2021-06-05 21:16:20,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:16:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-06-05 21:16:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-06-05 21:16:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-06-05 21:16:22,350 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-06-05 21:16:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:22,350 INFO L482 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-06-05 21:16:22,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-06-05 21:16:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:22,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:22,819 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:23,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:23,029 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 787269176, now seen corresponding path program 185 times [2021-06-05 21:16:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:23,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793112923] [2021-06-05 21:16:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:23,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793112923] [2021-06-05 21:16:23,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793112923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162702797] [2021-06-05 21:16:23,212 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 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 21:16:23,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:16:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:23,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162702797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:23,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:23,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:16:23,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772170061] [2021-06-05 21:16:23,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:16:23,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:16:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:16:23,536 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:24,678 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-06-05 21:16:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:16:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:24,859 INFO L225 Difference]: With dead ends: 124836 [2021-06-05 21:16:24,860 INFO L226 Difference]: Without dead ends: 124802 [2021-06-05 21:16:24,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:16:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-06-05 21:16:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-06-05 21:16:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-06-05 21:16:26,914 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-06-05 21:16:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:26,914 INFO L482 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-06-05 21:16:26,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-06-05 21:16:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:26,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:26,971 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:27,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:27,171 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash -451380224, now seen corresponding path program 186 times [2021-06-05 21:16:27,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:27,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995627985] [2021-06-05 21:16:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:27,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995627985] [2021-06-05 21:16:27,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995627985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902239735] [2021-06-05 21:16:27,358 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 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 21:16:27,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:16:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902239735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:27,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:27,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 21:16:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85754253] [2021-06-05 21:16:27,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:16:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:16:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:16:27,833 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:28,745 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-06-05 21:16:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:30,077 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-06-05 21:16:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:16:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:30,274 INFO L225 Difference]: With dead ends: 131445 [2021-06-05 21:16:30,274 INFO L226 Difference]: Without dead ends: 131411 [2021-06-05 21:16:30,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1489.3ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:16:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-06-05 21:16:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-06-05 21:16:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-06-05 21:16:32,398 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-06-05 21:16:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:32,398 INFO L482 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-06-05 21:16:32,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-06-05 21:16:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:32,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:32,456 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:32,656 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -48899272, now seen corresponding path program 187 times [2021-06-05 21:16:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771814565] [2021-06-05 21:16:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:32,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:32,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771814565] [2021-06-05 21:16:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771814565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:32,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895509293] [2021-06-05 21:16:32,842 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 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 21:16:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:33,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895509293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:33,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:33,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:16:33,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993066880] [2021-06-05 21:16:33,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:16:33,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:16:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:16:33,220 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:34,737 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-06-05 21:16:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:16:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:34,923 INFO L225 Difference]: With dead ends: 127848 [2021-06-05 21:16:34,923 INFO L226 Difference]: Without dead ends: 127814 [2021-06-05 21:16:34,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:16:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-06-05 21:16:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-06-05 21:16:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-06-05 21:16:37,299 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-06-05 21:16:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:37,299 INFO L482 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-06-05 21:16:37,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-06-05 21:16:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:37,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:37,353 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:37,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 21:16:37,554 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash -728791296, now seen corresponding path program 188 times [2021-06-05 21:16:37,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:37,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473216747] [2021-06-05 21:16:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:37,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473216747] [2021-06-05 21:16:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473216747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92459387] [2021-06-05 21:16:37,742 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 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 21:16:37,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92459387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:38,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:38,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:16:38,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923843159] [2021-06-05 21:16:38,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:16:38,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:16:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:16:38,152 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:39,947 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-06-05 21:16:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:16:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:40,131 INFO L225 Difference]: With dead ends: 135363 [2021-06-05 21:16:40,131 INFO L226 Difference]: Without dead ends: 135320 [2021-06-05 21:16:40,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:16:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-06-05 21:16:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-06-05 21:16:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-06-05 21:16:42,406 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-06-05 21:16:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:42,406 INFO L482 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-06-05 21:16:42,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-06-05 21:16:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:42,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:42,469 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:42,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 21:16:42,691 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash 475376078, now seen corresponding path program 189 times [2021-06-05 21:16:42,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:42,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887583066] [2021-06-05 21:16:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:42,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:42,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887583066] [2021-06-05 21:16:42,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887583066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:42,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070731116] [2021-06-05 21:16:42,880 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 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 21:16:42,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:16:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070731116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:43,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:43,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:16:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807478034] [2021-06-05 21:16:43,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:16:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:16:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:16:43,206 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:44,399 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-06-05 21:16:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:16:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:44,583 INFO L225 Difference]: With dead ends: 128874 [2021-06-05 21:16:44,583 INFO L226 Difference]: Without dead ends: 128840 [2021-06-05 21:16:44,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:16:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-06-05 21:16:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-06-05 21:16:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-06-05 21:16:46,639 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-06-05 21:16:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-06-05 21:16:46,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-06-05 21:16:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:46,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:46,696 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:46,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:46,896 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash 434659222, now seen corresponding path program 190 times [2021-06-05 21:16:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:46,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674700822] [2021-06-05 21:16:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:47,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674700822] [2021-06-05 21:16:47,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674700822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047409600] [2021-06-05 21:16:47,082 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 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 21:16:47,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047409600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:47,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:47,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:16:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969220255] [2021-06-05 21:16:47,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:16:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:16:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:16:47,434 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:49,234 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-06-05 21:16:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:16:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:49,485 INFO L225 Difference]: With dead ends: 128806 [2021-06-05 21:16:49,485 INFO L226 Difference]: Without dead ends: 128772 [2021-06-05 21:16:49,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:16:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-06-05 21:16:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-06-05 21:16:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-06-05 21:16:51,397 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-06-05 21:16:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:51,398 INFO L482 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-06-05 21:16:51,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-06-05 21:16:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:51,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:51,456 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:51,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 21:16:51,656 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash 837140174, now seen corresponding path program 191 times [2021-06-05 21:16:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:51,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116757099] [2021-06-05 21:16:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:51,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116757099] [2021-06-05 21:16:51,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116757099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733937867] [2021-06-05 21:16:51,885 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 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 21:16:51,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:16:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:52,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733937867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:52,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:52,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:16:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461997753] [2021-06-05 21:16:52,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:16:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:16:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:16:52,766 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,091 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-06-05 21:16:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:16:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,281 INFO L225 Difference]: With dead ends: 131900 [2021-06-05 21:16:54,282 INFO L226 Difference]: Without dead ends: 131866 [2021-06-05 21:16:54,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1374.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:16:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-05 21:16:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-06-05 21:16:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-06-05 21:16:56,435 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-06-05 21:16:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-06-05 21:16:56,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-06-05 21:16:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:16:56,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,499 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:16:56,699 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1110209028, now seen corresponding path program 192 times [2021-06-05 21:16:56,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415537408] [2021-06-05 21:16:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415537408] [2021-06-05 21:16:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415537408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012891110] [2021-06-05 21:16:56,903 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 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 21:16:56,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:16:56,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:16:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:57,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012891110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:57,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:57,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:16:57,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42570803] [2021-06-05 21:16:57,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:16:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:16:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:16:57,298 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,143 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-06-05 21:16:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,097 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-06-05 21:16:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:16:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:16:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,293 INFO L225 Difference]: With dead ends: 138710 [2021-06-05 21:16:59,294 INFO L226 Difference]: Without dead ends: 138667 [2021-06-05 21:16:59,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1224.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:16:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-06-05 21:17:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-06-05 21:17:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-06-05 21:17:01,599 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-06-05 21:17:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:01,599 INFO L482 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-06-05 21:17:01,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-06-05 21:17:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:01,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:01,657 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:01,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 21:17:01,858 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 796764494, now seen corresponding path program 193 times [2021-06-05 21:17:01,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:01,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547886252] [2021-06-05 21:17:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547886252] [2021-06-05 21:17:02,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547886252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705763483] [2021-06-05 21:17:02,042 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 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 21:17:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705763483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:02,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:02,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:17:02,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866646902] [2021-06-05 21:17:02,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:17:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:17:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:02,366 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:04,058 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-06-05 21:17:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:17:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:04,256 INFO L225 Difference]: With dead ends: 136993 [2021-06-05 21:17:04,256 INFO L226 Difference]: Without dead ends: 136959 [2021-06-05 21:17:04,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 767.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:17:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-06-05 21:17:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-06-05 21:17:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-06-05 21:17:06,651 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-06-05 21:17:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:06,652 INFO L482 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-06-05 21:17:06,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-06-05 21:17:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:06,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:06,714 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:06,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:06,914 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash 756047638, now seen corresponding path program 194 times [2021-06-05 21:17:06,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:06,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891165088] [2021-06-05 21:17:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891165088] [2021-06-05 21:17:07,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891165088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770305451] [2021-06-05 21:17:07,113 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 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 21:17:07,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:07,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:07,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770305451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:07,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 21:17:07,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568832547] [2021-06-05 21:17:07,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:17:07,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:17:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:17:07,465 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:08,960 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-06-05 21:17:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:17:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:09,170 INFO L225 Difference]: With dead ends: 136923 [2021-06-05 21:17:09,170 INFO L226 Difference]: Without dead ends: 136889 [2021-06-05 21:17:09,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:17:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-06-05 21:17:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-06-05 21:17:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-06-05 21:17:11,709 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-06-05 21:17:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:11,709 INFO L482 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-06-05 21:17:11,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-06-05 21:17:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:11,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:11,769 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:11,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 21:17:11,969 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1158528590, now seen corresponding path program 195 times [2021-06-05 21:17:11,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:11,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901435] [2021-06-05 21:17:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:12,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901435] [2021-06-05 21:17:12,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131901435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054065746] [2021-06-05 21:17:12,150 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 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 21:17:12,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:17:12,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:12,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:12,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:12,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054065746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:12,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:17:12,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786242020] [2021-06-05 21:17:12,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:17:12,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:17:12,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:17:12,540 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:14,772 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-06-05 21:17:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:17:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:14,972 INFO L225 Difference]: With dead ends: 141699 [2021-06-05 21:17:14,972 INFO L226 Difference]: Without dead ends: 141665 [2021-06-05 21:17:14,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:17:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-06-05 21:17:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-06-05 21:17:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138137 states to 138137 states and 320460 transitions. [2021-06-05 21:17:17,409 INFO L78 Accepts]: Start accepts. Automaton has 138137 states and 320460 transitions. Word has length 44 [2021-06-05 21:17:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:17,410 INFO L482 AbstractCegarLoop]: Abstraction has 138137 states and 320460 transitions. [2021-06-05 21:17:17,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 138137 states and 320460 transitions. [2021-06-05 21:17:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:17,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:17,471 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:17,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:17,671 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash -788820612, now seen corresponding path program 196 times [2021-06-05 21:17:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:17,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981669583] [2021-06-05 21:17:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:17,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981669583] [2021-06-05 21:17:17,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981669583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944729582] [2021-06-05 21:17:17,852 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 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 21:17:17,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:18,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944729582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:18,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:17:18,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742842170] [2021-06-05 21:17:18,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:17:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:17:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:17:18,252 INFO L87 Difference]: Start difference. First operand 138137 states and 320460 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:19,905 INFO L93 Difference]: Finished difference Result 147273 states and 341086 transitions. [2021-06-05 21:17:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:17:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:20,115 INFO L225 Difference]: With dead ends: 147273 [2021-06-05 21:17:20,115 INFO L226 Difference]: Without dead ends: 147230 [2021-06-05 21:17:20,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:17:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147230 states. [2021-06-05 21:17:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147230 to 144496. [2021-06-05 21:17:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 2.3211737430360913) internal successors, (335398), 144495 states have internal predecessors, (335398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 335398 transitions. [2021-06-05 21:17:22,592 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 335398 transitions. Word has length 44 [2021-06-05 21:17:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:22,592 INFO L482 AbstractCegarLoop]: Abstraction has 144496 states and 335398 transitions. [2021-06-05 21:17:22,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 335398 transitions. [2021-06-05 21:17:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:22,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:22,652 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:22,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:22,852 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1468482648, now seen corresponding path program 197 times [2021-06-05 21:17:22,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:22,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650254377] [2021-06-05 21:17:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:23,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650254377] [2021-06-05 21:17:23,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650254377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947131595] [2021-06-05 21:17:23,036 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 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 21:17:23,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:17:23,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:23,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947131595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:23,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 21:17:23,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202417399] [2021-06-05 21:17:23,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 21:17:23,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 21:17:23,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:17:23,493 INFO L87 Difference]: Start difference. First operand 144496 states and 335398 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:25,620 INFO L93 Difference]: Finished difference Result 148037 states and 343015 transitions. [2021-06-05 21:17:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:17:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:25,826 INFO L225 Difference]: With dead ends: 148037 [2021-06-05 21:17:25,826 INFO L226 Difference]: Without dead ends: 148020 [2021-06-05 21:17:25,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1112.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:17:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148020 states. [2021-06-05 21:17:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148020 to 145235. [2021-06-05 21:17:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145235 states, 145234 states have (on average 2.321660217304488) internal successors, (337184), 145234 states have internal predecessors, (337184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145235 states to 145235 states and 337184 transitions. [2021-06-05 21:17:28,221 INFO L78 Accepts]: Start accepts. Automaton has 145235 states and 337184 transitions. Word has length 44 [2021-06-05 21:17:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:28,221 INFO L482 AbstractCegarLoop]: Abstraction has 145235 states and 337184 transitions. [2021-06-05 21:17:28,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 145235 states and 337184 transitions. [2021-06-05 21:17:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:28,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:28,283 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:28,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 21:17:28,483 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2050092680, now seen corresponding path program 198 times [2021-06-05 21:17:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172216159] [2021-06-05 21:17:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:28,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:28,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172216159] [2021-06-05 21:17:28,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172216159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:28,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815477973] [2021-06-05 21:17:28,673 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 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 21:17:28,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:17:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:29,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815477973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:29,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:17:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842008336] [2021-06-05 21:17:29,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:17:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:17:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:17:29,071 INFO L87 Difference]: Start difference. First operand 145235 states and 337184 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:31,705 INFO L93 Difference]: Finished difference Result 154165 states and 356569 transitions. [2021-06-05 21:17:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:17:31,706 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:31,915 INFO L225 Difference]: With dead ends: 154165 [2021-06-05 21:17:31,915 INFO L226 Difference]: Without dead ends: 154131 [2021-06-05 21:17:31,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 909.8ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:17:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154131 states. [2021-06-05 21:17:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154131 to 147119. [2021-06-05 21:17:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147119 states, 147118 states have (on average 2.3230128196413764) internal successors, (341757), 147118 states have internal predecessors, (341757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147119 states to 147119 states and 341757 transitions. [2021-06-05 21:17:34,356 INFO L78 Accepts]: Start accepts. Automaton has 147119 states and 341757 transitions. Word has length 44 [2021-06-05 21:17:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:34,356 INFO L482 AbstractCegarLoop]: Abstraction has 147119 states and 341757 transitions. [2021-06-05 21:17:34,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 147119 states and 341757 transitions. [2021-06-05 21:17:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:34,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:34,417 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forcibly destroying the process [2021-06-05 21:17:34,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,837 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -951636672, now seen corresponding path program 199 times [2021-06-05 21:17:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566869843] [2021-06-05 21:17:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] The stream was forcibly closed: stdIn [2021-06-05 21:17:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:35,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566869843] [2021-06-05 21:17:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566869843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191079471] [2021-06-05 21:17:35,154 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 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 21:17:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:35,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191079471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:35,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:17:35,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638533937] [2021-06-05 21:17:35,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:17:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:17:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:35,493 INFO L87 Difference]: Start difference. First operand 147119 states and 341757 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:36,614 INFO L93 Difference]: Finished difference Result 147975 states and 343601 transitions. [2021-06-05 21:17:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:17:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:36,835 INFO L225 Difference]: With dead ends: 147975 [2021-06-05 21:17:36,835 INFO L226 Difference]: Without dead ends: 147958 [2021-06-05 21:17:36,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:17:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147958 states. [2021-06-05 21:17:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147958 to 147584. [2021-06-05 21:17:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147584 states, 147583 states have (on average 2.323268940189588) internal successors, (342875), 147583 states have internal predecessors, (342875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147584 states to 147584 states and 342875 transitions. [2021-06-05 21:17:39,261 INFO L78 Accepts]: Start accepts. Automaton has 147584 states and 342875 transitions. Word has length 44 [2021-06-05 21:17:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:39,261 INFO L482 AbstractCegarLoop]: Abstraction has 147584 states and 342875 transitions. [2021-06-05 21:17:39,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 147584 states and 342875 transitions. [2021-06-05 21:17:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:39,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:39,323 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:39,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 21:17:39,523 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash 929097336, now seen corresponding path program 200 times [2021-06-05 21:17:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:39,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128627941] [2021-06-05 21:17:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:39,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:39,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128627941] [2021-06-05 21:17:39,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128627941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:39,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849061515] [2021-06-05 21:17:39,718 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 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 21:17:39,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849061515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:40,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:17:40,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605620918] [2021-06-05 21:17:40,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:17:40,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:17:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:40,564 INFO L87 Difference]: Start difference. First operand 147584 states and 342875 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:41,914 INFO L93 Difference]: Finished difference Result 148649 states and 345197 transitions. [2021-06-05 21:17:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:17:41,915 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:42,116 INFO L225 Difference]: With dead ends: 148649 [2021-06-05 21:17:42,116 INFO L226 Difference]: Without dead ends: 148615 [2021-06-05 21:17:42,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1252.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:17:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148615 states. [2021-06-05 21:17:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148615 to 148228. [2021-06-05 21:17:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148228 states, 148227 states have (on average 2.323483575866745) internal successors, (344403), 148227 states have internal predecessors, (344403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148228 states to 148228 states and 344403 transitions. [2021-06-05 21:17:44,496 INFO L78 Accepts]: Start accepts. Automaton has 148228 states and 344403 transitions. Word has length 44 [2021-06-05 21:17:44,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:44,496 INFO L482 AbstractCegarLoop]: Abstraction has 148228 states and 344403 transitions. [2021-06-05 21:17:44,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 148228 states and 344403 transitions. [2021-06-05 21:17:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:44,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:44,569 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:44,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 21:17:44,770 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash 888380480, now seen corresponding path program 201 times [2021-06-05 21:17:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:44,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454369698] [2021-06-05 21:17:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:44,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454369698] [2021-06-05 21:17:44,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454369698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453693366] [2021-06-05 21:17:44,961 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 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 21:17:44,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:17:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453693366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:45,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:45,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:17:45,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582370551] [2021-06-05 21:17:45,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:17:45,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:17:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:17:45,875 INFO L87 Difference]: Start difference. First operand 148228 states and 344403 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:48,006 INFO L93 Difference]: Finished difference Result 153460 states and 355839 transitions. [2021-06-05 21:17:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:17:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:48,605 INFO L225 Difference]: With dead ends: 153460 [2021-06-05 21:17:48,605 INFO L226 Difference]: Without dead ends: 153426 [2021-06-05 21:17:48,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1496.1ms TimeCoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:17:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2021-06-05 21:17:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 149372. [2021-06-05 21:17:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149372 states, 149371 states have (on average 2.323878128954081) internal successors, (347120), 149371 states have internal predecessors, (347120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149372 states to 149372 states and 347120 transitions. [2021-06-05 21:17:51,146 INFO L78 Accepts]: Start accepts. Automaton has 149372 states and 347120 transitions. Word has length 44 [2021-06-05 21:17:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:51,147 INFO L482 AbstractCegarLoop]: Abstraction has 149372 states and 347120 transitions. [2021-06-05 21:17:51,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 149372 states and 347120 transitions. [2021-06-05 21:17:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:51,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:51,206 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:51,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:51,406 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1290861432, now seen corresponding path program 202 times [2021-06-05 21:17:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:51,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526589695] [2021-06-05 21:17:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:51,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:51,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526589695] [2021-06-05 21:17:51,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526589695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:51,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320562720] [2021-06-05 21:17:51,595 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 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 21:17:51,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:52,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320562720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:52,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 21:17:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704625561] [2021-06-05 21:17:52,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:17:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:17:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:17:52,014 INFO L87 Difference]: Start difference. First operand 149372 states and 347120 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:53,133 INFO L93 Difference]: Finished difference Result 149842 states and 348098 transitions. [2021-06-05 21:17:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:17:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:53,782 INFO L225 Difference]: With dead ends: 149842 [2021-06-05 21:17:53,783 INFO L226 Difference]: Without dead ends: 149808 [2021-06-05 21:17:53,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:17:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149808 states. [2021-06-05 21:17:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149808 to 149694. [2021-06-05 21:17:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149694 states, 149693 states have (on average 2.3235555436793973) internal successors, (347820), 149693 states have internal predecessors, (347820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149694 states to 149694 states and 347820 transitions. [2021-06-05 21:17:56,156 INFO L78 Accepts]: Start accepts. Automaton has 149694 states and 347820 transitions. Word has length 44 [2021-06-05 21:17:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:56,156 INFO L482 AbstractCegarLoop]: Abstraction has 149694 states and 347820 transitions. [2021-06-05 21:17:56,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 149694 states and 347820 transitions. [2021-06-05 21:17:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:17:56,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:56,234 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:56,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 21:17:56,449 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash 610969408, now seen corresponding path program 203 times [2021-06-05 21:17:56,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:56,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911975571] [2021-06-05 21:17:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:56,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911975571] [2021-06-05 21:17:56,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911975571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656424898] [2021-06-05 21:17:56,671 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 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 21:17:56,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:17:56,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:56,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:17:56,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:57,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656424898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:57,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:17:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825043219] [2021-06-05 21:17:57,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:17:57,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:17:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:17:57,140 INFO L87 Difference]: Start difference. First operand 149694 states and 347820 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:58,486 INFO L93 Difference]: Finished difference Result 154647 states and 358583 transitions. [2021-06-05 21:17:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:17:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:17:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:59,122 INFO L225 Difference]: With dead ends: 154647 [2021-06-05 21:17:59,122 INFO L226 Difference]: Without dead ends: 154604 [2021-06-05 21:17:59,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 838.1ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:17:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154604 states. [2021-06-05 21:18:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154604 to 151953. [2021-06-05 21:18:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151953 states, 151952 states have (on average 2.3238456881120353) internal successors, (353113), 151952 states have internal predecessors, (353113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 353113 transitions. [2021-06-05 21:18:02,019 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 353113 transitions. Word has length 44 [2021-06-05 21:18:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:02,019 INFO L482 AbstractCegarLoop]: Abstraction has 151953 states and 353113 transitions. [2021-06-05 21:18:02,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 353113 transitions. [2021-06-05 21:18:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:18:02,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:02,097 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:02,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:02,320 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1336149806, now seen corresponding path program 204 times [2021-06-05 21:18:02,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:02,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514344351] [2021-06-05 21:18:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:02,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:02,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514344351] [2021-06-05 21:18:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514344351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:02,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594920088] [2021-06-05 21:18:02,602 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 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 21:18:02,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:18:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:03,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594920088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:03,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 21:18:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201315877] [2021-06-05 21:18:03,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 21:18:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 21:18:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:18:03,161 INFO L87 Difference]: Start difference. First operand 151953 states and 353113 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:05,651 INFO L93 Difference]: Finished difference Result 162794 states and 376829 transitions. [2021-06-05 21:18:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:18:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:18:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:05,867 INFO L225 Difference]: With dead ends: 162794 [2021-06-05 21:18:05,868 INFO L226 Difference]: Without dead ends: 162760 [2021-06-05 21:18:05,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1196.4ms TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:18:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162760 states. [2021-06-05 21:18:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162760 to 155259. [2021-06-05 21:18:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155259 states, 155258 states have (on average 2.325992863491736) internal successors, (361129), 155258 states have internal predecessors, (361129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155259 states to 155259 states and 361129 transitions. [2021-06-05 21:18:08,386 INFO L78 Accepts]: Start accepts. Automaton has 155259 states and 361129 transitions. Word has length 44 [2021-06-05 21:18:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:08,386 INFO L482 AbstractCegarLoop]: Abstraction has 155259 states and 361129 transitions. [2021-06-05 21:18:08,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 155259 states and 361129 transitions. [2021-06-05 21:18:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:18:08,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:08,452 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:08,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 21:18:08,653 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -978146052, now seen corresponding path program 205 times [2021-06-05 21:18:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:08,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417949123] [2021-06-05 21:18:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:08,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:08,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417949123] [2021-06-05 21:18:08,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417949123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:08,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824796237] [2021-06-05 21:18:08,841 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 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 21:18:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:18:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:09,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824796237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:09,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:18:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944097758] [2021-06-05 21:18:09,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:18:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:18:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:18:09,174 INFO L87 Difference]: Start difference. First operand 155259 states and 361129 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:10,734 INFO L93 Difference]: Finished difference Result 156045 states and 362832 transitions. [2021-06-05 21:18:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:18:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:18:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:10,948 INFO L225 Difference]: With dead ends: 156045 [2021-06-05 21:18:10,948 INFO L226 Difference]: Without dead ends: 156028 [2021-06-05 21:18:10,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 650.4ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:18:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156028 states. [2021-06-05 21:18:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156028 to 155729. [2021-06-05 21:18:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155729 states, 155728 states have (on average 2.3262290660639064) internal successors, (362259), 155728 states have internal predecessors, (362259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155729 states to 155729 states and 362259 transitions. [2021-06-05 21:18:13,533 INFO L78 Accepts]: Start accepts. Automaton has 155729 states and 362259 transitions. Word has length 44 [2021-06-05 21:18:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:13,533 INFO L482 AbstractCegarLoop]: Abstraction has 155729 states and 362259 transitions. [2021-06-05 21:18:13,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 155729 states and 362259 transitions. [2021-06-05 21:18:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:18:13,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:13,596 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:13,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:13,796 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1891878054, now seen corresponding path program 206 times [2021-06-05 21:18:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:13,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435000492] [2021-06-05 21:18:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:13,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:13,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435000492] [2021-06-05 21:18:13,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435000492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664085243] [2021-06-05 21:18:13,982 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 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 21:18:14,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:18:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664085243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:14,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 21:18:14,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228796090] [2021-06-05 21:18:14,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:18:14,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:18:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:18:14,307 INFO L87 Difference]: Start difference. First operand 155729 states and 362259 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,007 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-06-05 21:18:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:15,852 INFO L93 Difference]: Finished difference Result 156514 states and 363952 transitions. [2021-06-05 21:18:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:18:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:18:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:16,080 INFO L225 Difference]: With dead ends: 156514 [2021-06-05 21:18:16,080 INFO L226 Difference]: Without dead ends: 156497 [2021-06-05 21:18:16,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1092.3ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:18:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156497 states. [2021-06-05 21:18:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156497 to 156189. [2021-06-05 21:18:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156189 states, 156188 states have (on average 2.32645913898635) internal successors, (363365), 156188 states have internal predecessors, (363365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156189 states to 156189 states and 363365 transitions. [2021-06-05 21:18:18,670 INFO L78 Accepts]: Start accepts. Automaton has 156189 states and 363365 transitions. Word has length 44 [2021-06-05 21:18:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:18,670 INFO L482 AbstractCegarLoop]: Abstraction has 156189 states and 363365 transitions. [2021-06-05 21:18:18,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 156189 states and 363365 transitions. [2021-06-05 21:18:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:18,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:18,736 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 21:18:18,936 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1728055526, now seen corresponding path program 207 times [2021-06-05 21:18:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:18,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287216816] [2021-06-05 21:18:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:18,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287216816] [2021-06-05 21:18:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287216816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637737845] [2021-06-05 21:18:18,962 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 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 21:18:18,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:18:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637737845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:19,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:18:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912685218] [2021-06-05 21:18:19,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:18:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:18:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:18:19,035 INFO L87 Difference]: Start difference. First operand 156189 states and 363365 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:20,133 INFO L93 Difference]: Finished difference Result 158663 states and 368214 transitions. [2021-06-05 21:18:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:18:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:20,374 INFO L225 Difference]: With dead ends: 158663 [2021-06-05 21:18:20,375 INFO L226 Difference]: Without dead ends: 158660 [2021-06-05 21:18:20,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158660 states. [2021-06-05 21:18:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158660 to 156670. [2021-06-05 21:18:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 2.3263951387958053) internal successors, (364474), 156669 states have internal predecessors, (364474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 364474 transitions. [2021-06-05 21:18:23,043 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 364474 transitions. Word has length 45 [2021-06-05 21:18:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:23,043 INFO L482 AbstractCegarLoop]: Abstraction has 156670 states and 364474 transitions. [2021-06-05 21:18:23,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 364474 transitions. [2021-06-05 21:18:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:23,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:23,105 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:23,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 21:18:23,308 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash 673568842, now seen corresponding path program 208 times [2021-06-05 21:18:23,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:23,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817376285] [2021-06-05 21:18:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:23,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817376285] [2021-06-05 21:18:23,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817376285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778715423] [2021-06-05 21:18:23,334 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 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 21:18:23,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:23,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:18:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778715423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:23,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:18:23,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358014968] [2021-06-05 21:18:23,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:18:23,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:18:23,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:18:23,426 INFO L87 Difference]: Start difference. First operand 156670 states and 364474 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:23,946 INFO L93 Difference]: Finished difference Result 183701 states and 427253 transitions. [2021-06-05 21:18:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:24,863 INFO L225 Difference]: With dead ends: 183701 [2021-06-05 21:18:24,863 INFO L226 Difference]: Without dead ends: 183701 [2021-06-05 21:18:24,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183701 states. [2021-06-05 21:18:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183701 to 177881. [2021-06-05 21:18:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177881 states, 177880 states have (on average 2.3365639757139647) internal successors, (415628), 177880 states have internal predecessors, (415628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177881 states to 177881 states and 415628 transitions. [2021-06-05 21:18:27,683 INFO L78 Accepts]: Start accepts. Automaton has 177881 states and 415628 transitions. Word has length 45 [2021-06-05 21:18:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 177881 states and 415628 transitions. [2021-06-05 21:18:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 177881 states and 415628 transitions. [2021-06-05 21:18:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:27,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:27,747 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:27,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:27,947 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1350623474, now seen corresponding path program 209 times [2021-06-05 21:18:27,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:27,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386503676] [2021-06-05 21:18:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:27,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386503676] [2021-06-05 21:18:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386503676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042008321] [2021-06-05 21:18:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:27,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:27,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:18:28,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042008321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:28,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:18:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731627503] [2021-06-05 21:18:28,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:18:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:18:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:18:28,048 INFO L87 Difference]: Start difference. First operand 177881 states and 415628 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:29,181 INFO L93 Difference]: Finished difference Result 180381 states and 420212 transitions. [2021-06-05 21:18:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:18:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:29,459 INFO L225 Difference]: With dead ends: 180381 [2021-06-05 21:18:29,459 INFO L226 Difference]: Without dead ends: 180357 [2021-06-05 21:18:29,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180357 states. [2021-06-05 21:18:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180357 to 177716. [2021-06-05 21:18:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3318965759783925) internal successors, (414413), 177715 states have internal predecessors, (414413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414413 transitions. [2021-06-05 21:18:32,276 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414413 transitions. Word has length 45 [2021-06-05 21:18:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:32,276 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414413 transitions. [2021-06-05 21:18:32,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414413 transitions. [2021-06-05 21:18:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:32,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:32,341 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:32,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 21:18:32,541 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash -286948982, now seen corresponding path program 210 times [2021-06-05 21:18:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:32,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113667654] [2021-06-05 21:18:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:32,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:32,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113667654] [2021-06-05 21:18:32,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113667654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504769029] [2021-06-05 21:18:32,572 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 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 21:18:32,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:32,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504769029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:18:32,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914409526] [2021-06-05 21:18:32,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:18:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:18:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:18:32,644 INFO L87 Difference]: Start difference. First operand 177716 states and 414413 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:33,819 INFO L93 Difference]: Finished difference Result 180087 states and 418773 transitions. [2021-06-05 21:18:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:34,083 INFO L225 Difference]: With dead ends: 180087 [2021-06-05 21:18:34,083 INFO L226 Difference]: Without dead ends: 180075 [2021-06-05 21:18:34,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180075 states. [2021-06-05 21:18:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180075 to 177716. [2021-06-05 21:18:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3297020510367723) internal successors, (414023), 177715 states have internal predecessors, (414023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414023 transitions. [2021-06-05 21:18:37,152 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414023 transitions. Word has length 45 [2021-06-05 21:18:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:37,152 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414023 transitions. [2021-06-05 21:18:37,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414023 transitions. [2021-06-05 21:18:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:37,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:37,725 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:37,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 21:18:37,932 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1882064834, now seen corresponding path program 211 times [2021-06-05 21:18:37,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:37,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462726942] [2021-06-05 21:18:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:37,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462726942] [2021-06-05 21:18:37,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462726942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297704229] [2021-06-05 21:18:37,958 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 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 21:18:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:18:38,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297704229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:38,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:38,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:18:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100426554] [2021-06-05 21:18:38,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:18:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:18:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:18:38,041 INFO L87 Difference]: Start difference. First operand 177716 states and 414023 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:38,596 INFO L93 Difference]: Finished difference Result 193419 states and 449644 transitions. [2021-06-05 21:18:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:38,875 INFO L225 Difference]: With dead ends: 193419 [2021-06-05 21:18:38,875 INFO L226 Difference]: Without dead ends: 193419 [2021-06-05 21:18:38,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193419 states. [2021-06-05 21:18:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193419 to 188453. [2021-06-05 21:18:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188453 states, 188452 states have (on average 2.3340532337146858) internal successors, (439857), 188452 states have internal predecessors, (439857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188453 states to 188453 states and 439857 transitions. [2021-06-05 21:18:42,727 INFO L78 Accepts]: Start accepts. Automaton has 188453 states and 439857 transitions. Word has length 45 [2021-06-05 21:18:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:42,727 INFO L482 AbstractCegarLoop]: Abstraction has 188453 states and 439857 transitions. [2021-06-05 21:18:42,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 188453 states and 439857 transitions. [2021-06-05 21:18:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:42,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:42,794 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:42,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:42,994 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1205010202, now seen corresponding path program 212 times [2021-06-05 21:18:42,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:42,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261055265] [2021-06-05 21:18:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:43,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261055265] [2021-06-05 21:18:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261055265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634901472] [2021-06-05 21:18:43,021 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 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 21:18:43,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:43,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:18:43,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634901472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:43,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:43,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:18:43,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843382534] [2021-06-05 21:18:43,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:18:43,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:18:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:18:43,094 INFO L87 Difference]: Start difference. First operand 188453 states and 439857 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:43,677 INFO L93 Difference]: Finished difference Result 191124 states and 444736 transitions. [2021-06-05 21:18:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:18:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:43,956 INFO L225 Difference]: With dead ends: 191124 [2021-06-05 21:18:43,956 INFO L226 Difference]: Without dead ends: 191109 [2021-06-05 21:18:43,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191109 states. [2021-06-05 21:18:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191109 to 188396. [2021-06-05 21:18:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188396 states, 188395 states have (on average 2.3323602006422677) internal successors, (439405), 188395 states have internal predecessors, (439405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188396 states to 188396 states and 439405 transitions. [2021-06-05 21:18:47,597 INFO L78 Accepts]: Start accepts. Automaton has 188396 states and 439405 transitions. Word has length 45 [2021-06-05 21:18:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:47,597 INFO L482 AbstractCegarLoop]: Abstraction has 188396 states and 439405 transitions. [2021-06-05 21:18:47,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 188396 states and 439405 transitions. [2021-06-05 21:18:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:47,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:47,663 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:47,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 21:18:47,863 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1452384638, now seen corresponding path program 213 times [2021-06-05 21:18:47,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:47,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319585326] [2021-06-05 21:18:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:47,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:47,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319585326] [2021-06-05 21:18:47,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319585326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:47,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245483123] [2021-06-05 21:18:47,895 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 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 21:18:47,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:18:47,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:47,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:18:47,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245483123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:47,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:47,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:18:47,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436839816] [2021-06-05 21:18:47,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:18:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:18:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:18:47,970 INFO L87 Difference]: Start difference. First operand 188396 states and 439405 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:49,202 INFO L93 Difference]: Finished difference Result 191049 states and 444257 transitions. [2021-06-05 21:18:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:49,480 INFO L225 Difference]: With dead ends: 191049 [2021-06-05 21:18:49,481 INFO L226 Difference]: Without dead ends: 191028 [2021-06-05 21:18:49,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191028 states. [2021-06-05 21:18:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191028 to 176453. [2021-06-05 21:18:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176453 states, 176452 states have (on average 2.3230793643597125) internal successors, (409912), 176452 states have internal predecessors, (409912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176453 states to 176453 states and 409912 transitions. [2021-06-05 21:18:53,054 INFO L78 Accepts]: Start accepts. Automaton has 176453 states and 409912 transitions. Word has length 45 [2021-06-05 21:18:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:53,054 INFO L482 AbstractCegarLoop]: Abstraction has 176453 states and 409912 transitions. [2021-06-05 21:18:53,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 176453 states and 409912 transitions. [2021-06-05 21:18:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:53,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:53,133 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:53,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 21:18:53,356 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 397030818, now seen corresponding path program 214 times [2021-06-05 21:18:53,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:53,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040558536] [2021-06-05 21:18:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:53,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:53,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040558536] [2021-06-05 21:18:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040558536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:53,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750693404] [2021-06-05 21:18:53,393 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 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 21:18:53,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:18:53,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750693404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:53,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:53,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:18:53,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473650771] [2021-06-05 21:18:53,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:18:53,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:18:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:18:53,469 INFO L87 Difference]: Start difference. First operand 176453 states and 409912 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:54,030 INFO L93 Difference]: Finished difference Result 179004 states and 414579 transitions. [2021-06-05 21:18:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:18:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:54,292 INFO L225 Difference]: With dead ends: 179004 [2021-06-05 21:18:54,293 INFO L226 Difference]: Without dead ends: 178983 [2021-06-05 21:18:54,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178983 states. [2021-06-05 21:18:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178983 to 176468. [2021-06-05 21:18:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176468 states, 176467 states have (on average 2.322660894104847) internal successors, (409873), 176467 states have internal predecessors, (409873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176468 states to 176468 states and 409873 transitions. [2021-06-05 21:18:57,883 INFO L78 Accepts]: Start accepts. Automaton has 176468 states and 409873 transitions. Word has length 45 [2021-06-05 21:18:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:57,883 INFO L482 AbstractCegarLoop]: Abstraction has 176468 states and 409873 transitions. [2021-06-05 21:18:57,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 176468 states and 409873 transitions. [2021-06-05 21:18:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:18:57,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:57,965 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 21:18:58,188 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1822368822, now seen corresponding path program 215 times [2021-06-05 21:18:58,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:58,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106220353] [2021-06-05 21:18:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:58,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106220353] [2021-06-05 21:18:58,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106220353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377070800] [2021-06-05 21:18:58,222 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 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 21:18:58,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:58,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:18:58,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377070800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:58,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:58,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:18:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239074355] [2021-06-05 21:18:58,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:18:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:18:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:18:58,299 INFO L87 Difference]: Start difference. First operand 176468 states and 409873 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:59,483 INFO L93 Difference]: Finished difference Result 186893 states and 434659 transitions. [2021-06-05 21:18:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:18:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:59,779 INFO L225 Difference]: With dead ends: 186893 [2021-06-05 21:18:59,779 INFO L226 Difference]: Without dead ends: 186893 [2021-06-05 21:18:59,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186893 states. [2021-06-05 21:19:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186893 to 130293. [2021-06-05 21:19:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130293 states, 130292 states have (on average 2.282711141129156) internal successors, (297419), 130292 states have internal predecessors, (297419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130293 states to 130293 states and 297419 transitions. [2021-06-05 21:19:02,485 INFO L78 Accepts]: Start accepts. Automaton has 130293 states and 297419 transitions. Word has length 45 [2021-06-05 21:19:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:02,485 INFO L482 AbstractCegarLoop]: Abstraction has 130293 states and 297419 transitions. [2021-06-05 21:19:02,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 130293 states and 297419 transitions. [2021-06-05 21:19:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:02,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:02,547 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:02,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:02,747 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:02,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1440909834, now seen corresponding path program 216 times [2021-06-05 21:19:02,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:02,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520561251] [2021-06-05 21:19:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:02,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520561251] [2021-06-05 21:19:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520561251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980197212] [2021-06-05 21:19:02,775 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 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 21:19:02,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:02,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980197212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:02,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:19:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747263569] [2021-06-05 21:19:02,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:19:02,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:19:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:19:02,852 INFO L87 Difference]: Start difference. First operand 130293 states and 297419 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:03,262 INFO L93 Difference]: Finished difference Result 136987 states and 313402 transitions. [2021-06-05 21:19:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:04,024 INFO L225 Difference]: With dead ends: 136987 [2021-06-05 21:19:04,024 INFO L226 Difference]: Without dead ends: 136987 [2021-06-05 21:19:04,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136987 states. [2021-06-05 21:19:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136987 to 131004. [2021-06-05 21:19:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131004 states, 131003 states have (on average 2.2863369541155545) internal successors, (299517), 131003 states have internal predecessors, (299517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131004 states to 131004 states and 299517 transitions. [2021-06-05 21:19:06,483 INFO L78 Accepts]: Start accepts. Automaton has 131004 states and 299517 transitions. Word has length 45 [2021-06-05 21:19:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:06,483 INFO L482 AbstractCegarLoop]: Abstraction has 131004 states and 299517 transitions. [2021-06-05 21:19:06,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 131004 states and 299517 transitions. [2021-06-05 21:19:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:06,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:06,550 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:06,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 21:19:06,773 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 120349642, now seen corresponding path program 217 times [2021-06-05 21:19:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:06,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486306930] [2021-06-05 21:19:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486306930] [2021-06-05 21:19:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486306930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116190116] [2021-06-05 21:19:06,799 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 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 21:19:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:06,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116190116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:06,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:06,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908985043] [2021-06-05 21:19:06,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:06,895 INFO L87 Difference]: Start difference. First operand 131004 states and 299517 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:07,271 INFO L93 Difference]: Finished difference Result 136350 states and 310930 transitions. [2021-06-05 21:19:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:07,458 INFO L225 Difference]: With dead ends: 136350 [2021-06-05 21:19:07,458 INFO L226 Difference]: Without dead ends: 136350 [2021-06-05 21:19:07,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136350 states. [2021-06-05 21:19:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136350 to 133513. [2021-06-05 21:19:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133513 states, 133512 states have (on average 2.2889178500808915) internal successors, (305598), 133512 states have internal predecessors, (305598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133513 states to 133513 states and 305598 transitions. [2021-06-05 21:19:09,850 INFO L78 Accepts]: Start accepts. Automaton has 133513 states and 305598 transitions. Word has length 45 [2021-06-05 21:19:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:09,850 INFO L482 AbstractCegarLoop]: Abstraction has 133513 states and 305598 transitions. [2021-06-05 21:19:09,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 133513 states and 305598 transitions. [2021-06-05 21:19:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:09,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:09,914 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:10,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 21:19:10,115 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 797404274, now seen corresponding path program 218 times [2021-06-05 21:19:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:10,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622925687] [2021-06-05 21:19:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622925687] [2021-06-05 21:19:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622925687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756759408] [2021-06-05 21:19:10,139 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 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 21:19:10,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:10,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756759408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:10,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:10,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517336096] [2021-06-05 21:19:10,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:10,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:10,213 INFO L87 Difference]: Start difference. First operand 133513 states and 305598 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:10,638 INFO L93 Difference]: Finished difference Result 136108 states and 310337 transitions. [2021-06-05 21:19:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:11,316 INFO L225 Difference]: With dead ends: 136108 [2021-06-05 21:19:11,316 INFO L226 Difference]: Without dead ends: 136105 [2021-06-05 21:19:11,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:19:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136105 states. [2021-06-05 21:19:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136105 to 133512. [2021-06-05 21:19:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2888451138857473) internal successors, (305586), 133511 states have internal predecessors, (305586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305586 transitions. [2021-06-05 21:19:13,716 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305586 transitions. Word has length 45 [2021-06-05 21:19:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:13,717 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305586 transitions. [2021-06-05 21:19:13,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305586 transitions. [2021-06-05 21:19:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:13,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:13,789 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:14,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,009 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash -840168182, now seen corresponding path program 219 times [2021-06-05 21:19:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788831526] [2021-06-05 21:19:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:14,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:14,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788831526] [2021-06-05 21:19:14,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788831526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007306612] [2021-06-05 21:19:14,037 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 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 21:19:14,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:19:14,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:14,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:14,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007306612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:14,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:19:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933040600] [2021-06-05 21:19:14,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:19:14,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:19:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:19:14,115 INFO L87 Difference]: Start difference. First operand 133512 states and 305586 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:14,533 INFO L93 Difference]: Finished difference Result 136143 states and 310391 transitions. [2021-06-05 21:19:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:14,761 INFO L225 Difference]: With dead ends: 136143 [2021-06-05 21:19:14,761 INFO L226 Difference]: Without dead ends: 136131 [2021-06-05 21:19:14,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136131 states. [2021-06-05 21:19:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136131 to 133512. [2021-06-05 21:19:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2885380230842403) internal successors, (305545), 133511 states have internal predecessors, (305545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305545 transitions. [2021-06-05 21:19:17,137 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305545 transitions. Word has length 45 [2021-06-05 21:19:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:17,137 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305545 transitions. [2021-06-05 21:19:17,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305545 transitions. [2021-06-05 21:19:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:17,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:17,201 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:17,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:17,401 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1895522002, now seen corresponding path program 220 times [2021-06-05 21:19:17,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:17,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274169951] [2021-06-05 21:19:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:17,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274169951] [2021-06-05 21:19:17,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274169951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248606792] [2021-06-05 21:19:17,435 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 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 21:19:17,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:17,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248606792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:17,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:19:17,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036836898] [2021-06-05 21:19:17,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:19:17,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:17,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:19:17,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:19:17,514 INFO L87 Difference]: Start difference. First operand 133512 states and 305545 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:17,957 INFO L93 Difference]: Finished difference Result 136170 states and 310404 transitions. [2021-06-05 21:19:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:18,653 INFO L225 Difference]: With dead ends: 136170 [2021-06-05 21:19:18,654 INFO L226 Difference]: Without dead ends: 136149 [2021-06-05 21:19:18,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136149 states. [2021-06-05 21:19:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136149 to 133512. [2021-06-05 21:19:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2883582626150654) internal successors, (305521), 133511 states have internal predecessors, (305521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305521 transitions. [2021-06-05 21:19:21,109 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305521 transitions. Word has length 45 [2021-06-05 21:19:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305521 transitions. [2021-06-05 21:19:21,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305521 transitions. [2021-06-05 21:19:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 21:19:21,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:21,218 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:21,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:21,419 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:21,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1514400394, now seen corresponding path program 221 times [2021-06-05 21:19:21,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:21,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936255986] [2021-06-05 21:19:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:21,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:21,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936255986] [2021-06-05 21:19:21,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936255986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971695901] [2021-06-05 21:19:21,455 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 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 21:19:21,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:21,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:21,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971695901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:21,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:19:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737634969] [2021-06-05 21:19:21,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:19:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:19:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:19:21,534 INFO L87 Difference]: Start difference. First operand 133512 states and 305521 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:21,970 INFO L93 Difference]: Finished difference Result 136071 states and 310197 transitions. [2021-06-05 21:19:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 21:19:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:22,162 INFO L225 Difference]: With dead ends: 136071 [2021-06-05 21:19:22,163 INFO L226 Difference]: Without dead ends: 136039 [2021-06-05 21:19:22,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136039 states. [2021-06-05 21:19:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136039 to 133542. [2021-06-05 21:19:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133542 states, 133541 states have (on average 2.2882036228573996) internal successors, (305569), 133541 states have internal predecessors, (305569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133542 states to 133542 states and 305569 transitions. [2021-06-05 21:19:24,532 INFO L78 Accepts]: Start accepts. Automaton has 133542 states and 305569 transitions. Word has length 45 [2021-06-05 21:19:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:24,532 INFO L482 AbstractCegarLoop]: Abstraction has 133542 states and 305569 transitions. [2021-06-05 21:19:24,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 133542 states and 305569 transitions. [2021-06-05 21:19:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:19:24,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:24,600 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:24,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 21:19:24,800 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1961990775, now seen corresponding path program 9 times [2021-06-05 21:19:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:24,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252265835] [2021-06-05 21:19:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-06-05 21:19:24,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252265835] [2021-06-05 21:19:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252265835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685588895] [2021-06-05 21:19:24,920 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 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 21:19:24,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:19:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:19:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-06-05 21:19:25,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685588895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:25,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:25,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:19:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316757805] [2021-06-05 21:19:25,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:19:25,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:25,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:19:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:25,090 INFO L87 Difference]: Start difference. First operand 133542 states and 305569 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:26,293 INFO L93 Difference]: Finished difference Result 133718 states and 305942 transitions. [2021-06-05 21:19:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:19:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:26,482 INFO L225 Difference]: With dead ends: 133718 [2021-06-05 21:19:26,483 INFO L226 Difference]: Without dead ends: 133571 [2021-06-05 21:19:26,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:19:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133571 states. [2021-06-05 21:19:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133571 to 133557. [2021-06-05 21:19:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133557 states, 133556 states have (on average 2.2881712540058103) internal successors, (305599), 133556 states have internal predecessors, (305599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133557 states to 133557 states and 305599 transitions. [2021-06-05 21:19:28,873 INFO L78 Accepts]: Start accepts. Automaton has 133557 states and 305599 transitions. Word has length 47 [2021-06-05 21:19:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:28,873 INFO L482 AbstractCegarLoop]: Abstraction has 133557 states and 305599 transitions. [2021-06-05 21:19:28,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 133557 states and 305599 transitions. [2021-06-05 21:19:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:19:28,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:28,944 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:29,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 21:19:29,144 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash -440972218, now seen corresponding path program 222 times [2021-06-05 21:19:29,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:29,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499306828] [2021-06-05 21:19:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499306828] [2021-06-05 21:19:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499306828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94936881] [2021-06-05 21:19:29,208 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 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 21:19:29,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:19:29,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:29,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94936881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:29,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 21:19:29,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111656723] [2021-06-05 21:19:29,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:19:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:19:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:29,349 INFO L87 Difference]: Start difference. First operand 133557 states and 305599 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:29,926 INFO L93 Difference]: Finished difference Result 137787 states and 313724 transitions. [2021-06-05 21:19:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:19:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:19:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:30,123 INFO L225 Difference]: With dead ends: 137787 [2021-06-05 21:19:30,123 INFO L226 Difference]: Without dead ends: 137787 [2021-06-05 21:19:30,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:19:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137787 states. [2021-06-05 21:19:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137787 to 113111. [2021-06-05 21:19:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113111 states, 113110 states have (on average 2.262116523737954) internal successors, (255868), 113110 states have internal predecessors, (255868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113111 states to 113111 states and 255868 transitions. [2021-06-05 21:19:32,291 INFO L78 Accepts]: Start accepts. Automaton has 113111 states and 255868 transitions. Word has length 47 [2021-06-05 21:19:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:32,291 INFO L482 AbstractCegarLoop]: Abstraction has 113111 states and 255868 transitions. [2021-06-05 21:19:32,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 113111 states and 255868 transitions. [2021-06-05 21:19:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:19:32,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:32,353 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:32,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 21:19:32,553 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2005544178, now seen corresponding path program 223 times [2021-06-05 21:19:32,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:32,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124762133] [2021-06-05 21:19:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 35 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:32,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:32,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124762133] [2021-06-05 21:19:32,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124762133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530683401] [2021-06-05 21:19:32,626 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 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 21:19:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530683401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:32,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 21:19:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896127539] [2021-06-05 21:19:32,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:19:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:19:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:32,769 INFO L87 Difference]: Start difference. First operand 113111 states and 255868 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:33,377 INFO L93 Difference]: Finished difference Result 114950 states and 255694 transitions. [2021-06-05 21:19:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:19:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:19:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:33,527 INFO L225 Difference]: With dead ends: 114950 [2021-06-05 21:19:33,528 INFO L226 Difference]: Without dead ends: 114864 [2021-06-05 21:19:33,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:19:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114864 states. [2021-06-05 21:19:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114864 to 112248. [2021-06-05 21:19:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112248 states, 112247 states have (on average 2.195755788573414) internal successors, (246467), 112247 states have internal predecessors, (246467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112248 states to 112248 states and 246467 transitions. [2021-06-05 21:19:35,541 INFO L78 Accepts]: Start accepts. Automaton has 112248 states and 246467 transitions. Word has length 47 [2021-06-05 21:19:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:35,542 INFO L482 AbstractCegarLoop]: Abstraction has 112248 states and 246467 transitions. [2021-06-05 21:19:35,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 112248 states and 246467 transitions. [2021-06-05 21:19:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:35,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:35,615 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:35,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:19:35,816 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1614465931, now seen corresponding path program 224 times [2021-06-05 21:19:35,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:35,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331053299] [2021-06-05 21:19:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:35,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:35,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331053299] [2021-06-05 21:19:35,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331053299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:35,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91225206] [2021-06-05 21:19:35,852 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 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 21:19:35,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:35,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91225206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:35,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:35,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:19:35,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427966682] [2021-06-05 21:19:35,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:19:35,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:19:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:19:35,934 INFO L87 Difference]: Start difference. First operand 112248 states and 246467 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:36,338 INFO L93 Difference]: Finished difference Result 121028 states and 266884 transitions. [2021-06-05 21:19:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:36,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:36,499 INFO L225 Difference]: With dead ends: 121028 [2021-06-05 21:19:36,499 INFO L226 Difference]: Without dead ends: 120876 [2021-06-05 21:19:36,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120876 states. [2021-06-05 21:19:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120876 to 120076. [2021-06-05 21:19:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120076 states, 120075 states have (on average 2.2036477201748905) internal successors, (264603), 120075 states have internal predecessors, (264603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120076 states to 120076 states and 264603 transitions. [2021-06-05 21:19:38,648 INFO L78 Accepts]: Start accepts. Automaton has 120076 states and 264603 transitions. Word has length 49 [2021-06-05 21:19:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:38,648 INFO L482 AbstractCegarLoop]: Abstraction has 120076 states and 264603 transitions. [2021-06-05 21:19:38,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 120076 states and 264603 transitions. [2021-06-05 21:19:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:38,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:38,726 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:38,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 21:19:38,929 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1623825095, now seen corresponding path program 225 times [2021-06-05 21:19:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968318072] [2021-06-05 21:19:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:38,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968318072] [2021-06-05 21:19:38,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968318072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225468862] [2021-06-05 21:19:38,953 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 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 21:19:38,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:19:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:38,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:39,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225468862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:39,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:39,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995879958] [2021-06-05 21:19:39,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:39,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:39,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:39,034 INFO L87 Difference]: Start difference. First operand 120076 states and 264603 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:39,401 INFO L93 Difference]: Finished difference Result 120556 states and 265078 transitions. [2021-06-05 21:19:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:40,016 INFO L225 Difference]: With dead ends: 120556 [2021-06-05 21:19:40,016 INFO L226 Difference]: Without dead ends: 120556 [2021-06-05 21:19:40,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120556 states. [2021-06-05 21:19:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120556 to 108555. [2021-06-05 21:19:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108555 states, 108554 states have (on average 2.1871510953074047) internal successors, (237424), 108554 states have internal predecessors, (237424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108555 states to 108555 states and 237424 transitions. [2021-06-05 21:19:41,708 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 237424 transitions. Word has length 49 [2021-06-05 21:19:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:41,709 INFO L482 AbstractCegarLoop]: Abstraction has 108555 states and 237424 transitions. [2021-06-05 21:19:41,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 237424 transitions. [2021-06-05 21:19:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:41,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:41,774 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:41,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:41,974 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -983710975, now seen corresponding path program 226 times [2021-06-05 21:19:41,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:41,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000588921] [2021-06-05 21:19:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:41,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000588921] [2021-06-05 21:19:41,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000588921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322345957] [2021-06-05 21:19:41,998 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 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 21:19:42,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:19:42,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322345957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:42,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:42,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382236239] [2021-06-05 21:19:42,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:42,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:42,088 INFO L87 Difference]: Start difference. First operand 108555 states and 237424 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:42,424 INFO L93 Difference]: Finished difference Result 110417 states and 241176 transitions. [2021-06-05 21:19:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:42,569 INFO L225 Difference]: With dead ends: 110417 [2021-06-05 21:19:42,569 INFO L226 Difference]: Without dead ends: 110409 [2021-06-05 21:19:42,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:19:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110409 states. [2021-06-05 21:19:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110409 to 109477. [2021-06-05 21:19:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109477 states, 109476 states have (on average 2.187420073806131) internal successors, (239470), 109476 states have internal predecessors, (239470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109477 states to 109477 states and 239470 transitions. [2021-06-05 21:19:44,625 INFO L78 Accepts]: Start accepts. Automaton has 109477 states and 239470 transitions. Word has length 49 [2021-06-05 21:19:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:44,625 INFO L482 AbstractCegarLoop]: Abstraction has 109477 states and 239470 transitions. [2021-06-05 21:19:44,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 109477 states and 239470 transitions. [2021-06-05 21:19:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:44,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:44,694 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:44,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 21:19:44,895 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1389078715, now seen corresponding path program 227 times [2021-06-05 21:19:44,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:44,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275694089] [2021-06-05 21:19:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:44,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275694089] [2021-06-05 21:19:44,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275694089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740797545] [2021-06-05 21:19:44,918 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 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 21:19:44,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:19:44,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:19:45,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740797545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:45,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:45,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:45,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045097848] [2021-06-05 21:19:45,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:45,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:45,002 INFO L87 Difference]: Start difference. First operand 109477 states and 239470 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:45,344 INFO L93 Difference]: Finished difference Result 116103 states and 252486 transitions. [2021-06-05 21:19:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:45,494 INFO L225 Difference]: With dead ends: 116103 [2021-06-05 21:19:45,494 INFO L226 Difference]: Without dead ends: 116100 [2021-06-05 21:19:45,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116100 states. [2021-06-05 21:19:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116100 to 110735. [2021-06-05 21:19:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110735 states, 110734 states have (on average 2.1854714902378674) internal successors, (242006), 110734 states have internal predecessors, (242006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110735 states to 110735 states and 242006 transitions. [2021-06-05 21:19:47,614 INFO L78 Accepts]: Start accepts. Automaton has 110735 states and 242006 transitions. Word has length 49 [2021-06-05 21:19:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:47,614 INFO L482 AbstractCegarLoop]: Abstraction has 110735 states and 242006 transitions. [2021-06-05 21:19:47,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 110735 states and 242006 transitions. [2021-06-05 21:19:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:47,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:47,684 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:47,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:47,884 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -923764673, now seen corresponding path program 228 times [2021-06-05 21:19:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:47,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285776956] [2021-06-05 21:19:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:47,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:47,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285776956] [2021-06-05 21:19:47,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285776956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:47,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708950053] [2021-06-05 21:19:47,928 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 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 21:19:47,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:19:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:48,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708950053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:48,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:48,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:19:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644987283] [2021-06-05 21:19:48,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:19:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:48,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:19:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:19:48,009 INFO L87 Difference]: Start difference. First operand 110735 states and 242006 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:48,367 INFO L93 Difference]: Finished difference Result 111907 states and 242798 transitions. [2021-06-05 21:19:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:48,526 INFO L225 Difference]: With dead ends: 111907 [2021-06-05 21:19:48,526 INFO L226 Difference]: Without dead ends: 111904 [2021-06-05 21:19:48,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111904 states. [2021-06-05 21:19:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111904 to 109531. [2021-06-05 21:19:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109531 states, 109530 states have (on average 2.175778325572902) internal successors, (238313), 109530 states have internal predecessors, (238313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109531 states to 109531 states and 238313 transitions. [2021-06-05 21:19:50,854 INFO L78 Accepts]: Start accepts. Automaton has 109531 states and 238313 transitions. Word has length 49 [2021-06-05 21:19:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:50,854 INFO L482 AbstractCegarLoop]: Abstraction has 109531 states and 238313 transitions. [2021-06-05 21:19:50,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 109531 states and 238313 transitions. [2021-06-05 21:19:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:50,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:50,936 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:51,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:51,158 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 961595637, now seen corresponding path program 229 times [2021-06-05 21:19:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:51,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890667479] [2021-06-05 21:19:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:19:51,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890667479] [2021-06-05 21:19:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890667479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210308921] [2021-06-05 21:19:51,183 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 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 21:19:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:51,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:51,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:19:51,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210308921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:51,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:51,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126464929] [2021-06-05 21:19:51,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:51,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:51,259 INFO L87 Difference]: Start difference. First operand 109531 states and 238313 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:51,606 INFO L93 Difference]: Finished difference Result 111152 states and 241442 transitions. [2021-06-05 21:19:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:51,754 INFO L225 Difference]: With dead ends: 111152 [2021-06-05 21:19:51,754 INFO L226 Difference]: Without dead ends: 111136 [2021-06-05 21:19:51,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:19:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111136 states. [2021-06-05 21:19:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111136 to 104672. [2021-06-05 21:19:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104672 states, 104671 states have (on average 2.1706967545929627) internal successors, (227209), 104671 states have internal predecessors, (227209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104672 states to 104672 states and 227209 transitions. [2021-06-05 21:19:53,834 INFO L78 Accepts]: Start accepts. Automaton has 104672 states and 227209 transitions. Word has length 49 [2021-06-05 21:19:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:53,834 INFO L482 AbstractCegarLoop]: Abstraction has 104672 states and 227209 transitions. [2021-06-05 21:19:53,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104672 states and 227209 transitions. [2021-06-05 21:19:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:53,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:53,902 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:54,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:54,103 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash 556227897, now seen corresponding path program 230 times [2021-06-05 21:19:54,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:54,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340984110] [2021-06-05 21:19:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:54,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:54,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340984110] [2021-06-05 21:19:54,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340984110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677076774] [2021-06-05 21:19:54,127 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 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 21:19:54,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:54,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:19:54,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677076774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:54,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:19:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571695456] [2021-06-05 21:19:54,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:19:54,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:19:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:19:54,206 INFO L87 Difference]: Start difference. First operand 104672 states and 227209 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:54,537 INFO L93 Difference]: Finished difference Result 112008 states and 241759 transitions. [2021-06-05 21:19:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:54,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:54,684 INFO L225 Difference]: With dead ends: 112008 [2021-06-05 21:19:54,684 INFO L226 Difference]: Without dead ends: 112005 [2021-06-05 21:19:54,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112005 states. [2021-06-05 21:19:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112005 to 105674. [2021-06-05 21:19:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105674 states, 105673 states have (on average 2.169229604534744) internal successors, (229229), 105673 states have internal predecessors, (229229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105674 states to 105674 states and 229229 transitions. [2021-06-05 21:19:56,741 INFO L78 Accepts]: Start accepts. Automaton has 105674 states and 229229 transitions. Word has length 49 [2021-06-05 21:19:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:56,741 INFO L482 AbstractCegarLoop]: Abstraction has 105674 states and 229229 transitions. [2021-06-05 21:19:56,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 105674 states and 229229 transitions. [2021-06-05 21:19:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:56,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:56,810 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:57,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:57,010 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1021541939, now seen corresponding path program 231 times [2021-06-05 21:19:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:57,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188356744] [2021-06-05 21:19:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:19:57,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:57,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188356744] [2021-06-05 21:19:57,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188356744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:57,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206550770] [2021-06-05 21:19:57,039 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 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 21:19:57,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:19:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:19:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:19:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206550770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:57,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:57,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:19:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819098773] [2021-06-05 21:19:57,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:19:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:19:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:19:57,139 INFO L87 Difference]: Start difference. First operand 105674 states and 229229 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:57,518 INFO L93 Difference]: Finished difference Result 112115 states and 241822 transitions. [2021-06-05 21:19:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:57,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:19:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:57,674 INFO L225 Difference]: With dead ends: 112115 [2021-06-05 21:19:57,674 INFO L226 Difference]: Without dead ends: 112103 [2021-06-05 21:19:57,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112103 states. [2021-06-05 21:19:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112103 to 107326. [2021-06-05 21:19:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107326 states, 107325 states have (on average 2.1642767295597483) internal successors, (232281), 107325 states have internal predecessors, (232281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107326 states to 107326 states and 232281 transitions. [2021-06-05 21:19:59,787 INFO L78 Accepts]: Start accepts. Automaton has 107326 states and 232281 transitions. Word has length 49 [2021-06-05 21:19:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:59,787 INFO L482 AbstractCegarLoop]: Abstraction has 107326 states and 232281 transitions. [2021-06-05 21:19:59,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 107326 states and 232281 transitions. [2021-06-05 21:19:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:19:59,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:59,858 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:00,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 21:20:00,058 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash -311108491, now seen corresponding path program 232 times [2021-06-05 21:20:00,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:00,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842855507] [2021-06-05 21:20:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:00,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:00,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842855507] [2021-06-05 21:20:00,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842855507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:00,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671606321] [2021-06-05 21:20:00,092 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 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 21:20:00,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:00,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:00,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671606321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:00,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:00,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:20:00,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156811238] [2021-06-05 21:20:00,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:20:00,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:20:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:20:00,172 INFO L87 Difference]: Start difference. First operand 107326 states and 232281 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:00,551 INFO L93 Difference]: Finished difference Result 108240 states and 232891 transitions. [2021-06-05 21:20:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:00,702 INFO L225 Difference]: With dead ends: 108240 [2021-06-05 21:20:00,702 INFO L226 Difference]: Without dead ends: 108228 [2021-06-05 21:20:00,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108228 states. [2021-06-05 21:20:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108228 to 103265. [2021-06-05 21:20:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103265 states, 103264 states have (on average 2.1579446854663775) internal successors, (222838), 103264 states have internal predecessors, (222838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103265 states to 103265 states and 222838 transitions. [2021-06-05 21:20:02,805 INFO L78 Accepts]: Start accepts. Automaton has 103265 states and 222838 transitions. Word has length 49 [2021-06-05 21:20:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:02,805 INFO L482 AbstractCegarLoop]: Abstraction has 103265 states and 222838 transitions. [2021-06-05 21:20:02,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 103265 states and 222838 transitions. [2021-06-05 21:20:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:02,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:02,874 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:03,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 21:20:03,075 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1989442113, now seen corresponding path program 233 times [2021-06-05 21:20:03,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:03,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142228083] [2021-06-05 21:20:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142228083] [2021-06-05 21:20:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142228083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106501470] [2021-06-05 21:20:03,113 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 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 21:20:03,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:20:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:20:03,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106501470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:03,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:20:03,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011170368] [2021-06-05 21:20:03,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:20:03,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:20:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:20:03,191 INFO L87 Difference]: Start difference. First operand 103265 states and 222838 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:03,527 INFO L93 Difference]: Finished difference Result 104033 states and 224074 transitions. [2021-06-05 21:20:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:20:03,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:03,661 INFO L225 Difference]: With dead ends: 104033 [2021-06-05 21:20:03,661 INFO L226 Difference]: Without dead ends: 103903 [2021-06-05 21:20:03,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103903 states. [2021-06-05 21:20:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103903 to 103141. [2021-06-05 21:20:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103141 states, 103140 states have (on average 2.135592398681404) internal successors, (220265), 103140 states have internal predecessors, (220265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103141 states to 103141 states and 220265 transitions. [2021-06-05 21:20:05,691 INFO L78 Accepts]: Start accepts. Automaton has 103141 states and 220265 transitions. Word has length 49 [2021-06-05 21:20:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:05,691 INFO L482 AbstractCegarLoop]: Abstraction has 103141 states and 220265 transitions. [2021-06-05 21:20:05,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 103141 states and 220265 transitions. [2021-06-05 21:20:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:05,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:05,771 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:05,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 21:20:05,994 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1596619917, now seen corresponding path program 234 times [2021-06-05 21:20:05,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:05,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074231492] [2021-06-05 21:20:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:06,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:06,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074231492] [2021-06-05 21:20:06,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074231492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:06,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441049188] [2021-06-05 21:20:06,025 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 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 21:20:06,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:06,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:06,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:06,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:20:06,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441049188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:06,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:06,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:20:06,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069337111] [2021-06-05 21:20:06,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:20:06,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:20:06,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:20:06,104 INFO L87 Difference]: Start difference. First operand 103141 states and 220265 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:06,528 INFO L93 Difference]: Finished difference Result 103620 states and 221040 transitions. [2021-06-05 21:20:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:06,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:06,713 INFO L225 Difference]: With dead ends: 103620 [2021-06-05 21:20:06,713 INFO L226 Difference]: Without dead ends: 103550 [2021-06-05 21:20:06,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103550 states. [2021-06-05 21:20:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103550 to 103135. [2021-06-05 21:20:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103135 states, 103134 states have (on average 2.1305679989140343) internal successors, (219734), 103134 states have internal predecessors, (219734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103135 states to 103135 states and 219734 transitions. [2021-06-05 21:20:08,537 INFO L78 Accepts]: Start accepts. Automaton has 103135 states and 219734 transitions. Word has length 49 [2021-06-05 21:20:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:08,537 INFO L482 AbstractCegarLoop]: Abstraction has 103135 states and 219734 transitions. [2021-06-05 21:20:08,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 103135 states and 219734 transitions. [2021-06-05 21:20:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:08,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:08,607 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:08,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 21:20:08,809 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1597148801, now seen corresponding path program 235 times [2021-06-05 21:20:08,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:08,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629057789] [2021-06-05 21:20:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:08,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629057789] [2021-06-05 21:20:08,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629057789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422266092] [2021-06-05 21:20:08,834 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 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 21:20:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:08,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422266092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:08,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:08,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:20:08,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260258826] [2021-06-05 21:20:08,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:20:08,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:20:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:20:08,911 INFO L87 Difference]: Start difference. First operand 103135 states and 219734 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:09,640 INFO L93 Difference]: Finished difference Result 104133 states and 221779 transitions. [2021-06-05 21:20:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:20:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:09,781 INFO L225 Difference]: With dead ends: 104133 [2021-06-05 21:20:09,781 INFO L226 Difference]: Without dead ends: 104127 [2021-06-05 21:20:09,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:20:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-06-05 21:20:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 103789. [2021-06-05 21:20:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103789 states, 103788 states have (on average 2.131229043820095) internal successors, (221196), 103788 states have internal predecessors, (221196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103789 states to 103789 states and 221196 transitions. [2021-06-05 21:20:11,360 INFO L78 Accepts]: Start accepts. Automaton has 103789 states and 221196 transitions. Word has length 49 [2021-06-05 21:20:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:11,360 INFO L482 AbstractCegarLoop]: Abstraction has 103789 states and 221196 transitions. [2021-06-05 21:20:11,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 103789 states and 221196 transitions. [2021-06-05 21:20:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:11,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:11,430 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:11,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:11,631 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:11,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1191781061, now seen corresponding path program 236 times [2021-06-05 21:20:11,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:11,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873444042] [2021-06-05 21:20:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:11,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873444042] [2021-06-05 21:20:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873444042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464497405] [2021-06-05 21:20:11,661 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 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 21:20:11,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:11,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:11,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464497405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:11,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:20:11,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535337265] [2021-06-05 21:20:11,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:20:11,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:20:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:20:11,744 INFO L87 Difference]: Start difference. First operand 103789 states and 221196 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:12,494 INFO L93 Difference]: Finished difference Result 107443 states and 228452 transitions. [2021-06-05 21:20:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:12,667 INFO L225 Difference]: With dead ends: 107443 [2021-06-05 21:20:12,667 INFO L226 Difference]: Without dead ends: 107440 [2021-06-05 21:20:12,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:20:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107440 states. [2021-06-05 21:20:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107440 to 103945. [2021-06-05 21:20:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103945 states, 103944 states have (on average 2.1310513353344107) internal successors, (221510), 103944 states have internal predecessors, (221510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103945 states to 103945 states and 221510 transitions. [2021-06-05 21:20:14,341 INFO L78 Accepts]: Start accepts. Automaton has 103945 states and 221510 transitions. Word has length 49 [2021-06-05 21:20:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:14,341 INFO L482 AbstractCegarLoop]: Abstraction has 103945 states and 221510 transitions. [2021-06-05 21:20:14,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 103945 states and 221510 transitions. [2021-06-05 21:20:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:14,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:14,441 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:14,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 21:20:14,642 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1657095103, now seen corresponding path program 237 times [2021-06-05 21:20:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:14,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358585721] [2021-06-05 21:20:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358585721] [2021-06-05 21:20:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358585721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:14,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700354114] [2021-06-05 21:20:14,675 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 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 21:20:14,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:20:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:14,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700354114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:14,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:14,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:20:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981152910] [2021-06-05 21:20:14,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:20:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:20:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:20:14,762 INFO L87 Difference]: Start difference. First operand 103945 states and 221510 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:15,157 INFO L93 Difference]: Finished difference Result 107813 states and 229254 transitions. [2021-06-05 21:20:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:20:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:15,326 INFO L225 Difference]: With dead ends: 107813 [2021-06-05 21:20:15,326 INFO L226 Difference]: Without dead ends: 107801 [2021-06-05 21:20:15,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107801 states. [2021-06-05 21:20:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107801 to 104405. [2021-06-05 21:20:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104405 states, 104404 states have (on average 2.130464350024903) internal successors, (222429), 104404 states have internal predecessors, (222429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104405 states to 104405 states and 222429 transitions. [2021-06-05 21:20:17,468 INFO L78 Accepts]: Start accepts. Automaton has 104405 states and 222429 transitions. Word has length 49 [2021-06-05 21:20:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:17,469 INFO L482 AbstractCegarLoop]: Abstraction has 104405 states and 222429 transitions. [2021-06-05 21:20:17,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 104405 states and 222429 transitions. [2021-06-05 21:20:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:17,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:17,540 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:17,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:17,743 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash 324444673, now seen corresponding path program 238 times [2021-06-05 21:20:17,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:17,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483104201] [2021-06-05 21:20:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:17,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483104201] [2021-06-05 21:20:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483104201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515663806] [2021-06-05 21:20:17,785 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 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 21:20:17,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:17,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:17,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:20:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515663806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:20:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564813595] [2021-06-05 21:20:17,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:20:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:20:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:20:17,876 INFO L87 Difference]: Start difference. First operand 104405 states and 222429 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:18,278 INFO L93 Difference]: Finished difference Result 105970 states and 225532 transitions. [2021-06-05 21:20:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:20:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:18,432 INFO L225 Difference]: With dead ends: 105970 [2021-06-05 21:20:18,432 INFO L226 Difference]: Without dead ends: 105949 [2021-06-05 21:20:18,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105949 states. [2021-06-05 21:20:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105949 to 104792. [2021-06-05 21:20:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104792 states, 104791 states have (on average 2.130039793493716) internal successors, (223209), 104791 states have internal predecessors, (223209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104792 states to 104792 states and 223209 transitions. [2021-06-05 21:20:20,501 INFO L78 Accepts]: Start accepts. Automaton has 104792 states and 223209 transitions. Word has length 49 [2021-06-05 21:20:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:20,501 INFO L482 AbstractCegarLoop]: Abstraction has 104792 states and 223209 transitions. [2021-06-05 21:20:20,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 104792 states and 223209 transitions. [2021-06-05 21:20:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 21:20:20,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:20,588 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:20,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:20,805 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2013168767, now seen corresponding path program 239 times [2021-06-05 21:20:20,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:20,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714767435] [2021-06-05 21:20:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714767435] [2021-06-05 21:20:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714767435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710152050] [2021-06-05 21:20:20,849 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 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 21:20:20,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:20:20,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:20:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:20:20,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710152050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:20,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:20,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:20:20,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270517575] [2021-06-05 21:20:20,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:20:20,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:20:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:20:20,949 INFO L87 Difference]: Start difference. First operand 104792 states and 223209 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:21,346 INFO L93 Difference]: Finished difference Result 105229 states and 223836 transitions. [2021-06-05 21:20:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:21,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 21:20:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:21,493 INFO L225 Difference]: With dead ends: 105229 [2021-06-05 21:20:21,494 INFO L226 Difference]: Without dead ends: 105208 [2021-06-05 21:20:21,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105208 states. [2021-06-05 21:20:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105208 to 103734. [2021-06-05 21:20:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103734 states, 103733 states have (on average 2.1289849903116655) internal successors, (220846), 103733 states have internal predecessors, (220846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103734 states to 103734 states and 220846 transitions. [2021-06-05 21:20:23,547 INFO L78 Accepts]: Start accepts. Automaton has 103734 states and 220846 transitions. Word has length 49 [2021-06-05 21:20:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:23,547 INFO L482 AbstractCegarLoop]: Abstraction has 103734 states and 220846 transitions. [2021-06-05 21:20:23,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 103734 states and 220846 transitions. [2021-06-05 21:20:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:23,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:23,609 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:23,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:23,809 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1555672066, now seen corresponding path program 10 times [2021-06-05 21:20:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949907332] [2021-06-05 21:20:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949907332] [2021-06-05 21:20:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949907332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360200907] [2021-06-05 21:20:23,877 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 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 21:20:23,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:20:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360200907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:23,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:20:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283774315] [2021-06-05 21:20:23,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:23,972 INFO L87 Difference]: Start difference. First operand 103734 states and 220846 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:24,436 INFO L93 Difference]: Finished difference Result 109277 states and 231415 transitions. [2021-06-05 21:20:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:20:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:24,577 INFO L225 Difference]: With dead ends: 109277 [2021-06-05 21:20:24,577 INFO L226 Difference]: Without dead ends: 109277 [2021-06-05 21:20:24,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109277 states. [2021-06-05 21:20:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109277 to 104079. [2021-06-05 21:20:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104079 states, 104078 states have (on average 2.1292396087549723) internal successors, (221607), 104078 states have internal predecessors, (221607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104079 states to 104079 states and 221607 transitions. [2021-06-05 21:20:26,580 INFO L78 Accepts]: Start accepts. Automaton has 104079 states and 221607 transitions. Word has length 50 [2021-06-05 21:20:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:26,580 INFO L482 AbstractCegarLoop]: Abstraction has 104079 states and 221607 transitions. [2021-06-05 21:20:26,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 104079 states and 221607 transitions. [2021-06-05 21:20:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:26,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:26,645 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:26,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:26,845 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:26,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1056573138, now seen corresponding path program 240 times [2021-06-05 21:20:26,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:26,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933827872] [2021-06-05 21:20:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:27,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933827872] [2021-06-05 21:20:27,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933827872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943407762] [2021-06-05 21:20:27,098 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 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 21:20:27,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:20:27,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:27,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:27,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:27,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943407762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:27,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-06-05 21:20:27,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106711292] [2021-06-05 21:20:27,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 21:20:27,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:27,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 21:20:27,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:20:27,738 INFO L87 Difference]: Start difference. First operand 104079 states and 221607 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:30,002 INFO L93 Difference]: Finished difference Result 115039 states and 245470 transitions. [2021-06-05 21:20:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:20:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:30,162 INFO L225 Difference]: With dead ends: 115039 [2021-06-05 21:20:30,162 INFO L226 Difference]: Without dead ends: 115005 [2021-06-05 21:20:30,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1413.1ms TimeCoverageRelationStatistics Valid=215, Invalid=3445, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:20:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-06-05 21:20:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 107215. [2021-06-05 21:20:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107215 states, 107214 states have (on average 2.1362508627604604) internal successors, (229036), 107214 states have internal predecessors, (229036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107215 states to 107215 states and 229036 transitions. [2021-06-05 21:20:31,853 INFO L78 Accepts]: Start accepts. Automaton has 107215 states and 229036 transitions. Word has length 50 [2021-06-05 21:20:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:31,853 INFO L482 AbstractCegarLoop]: Abstraction has 107215 states and 229036 transitions. [2021-06-05 21:20:31,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 107215 states and 229036 transitions. [2021-06-05 21:20:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:32,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:32,325 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:32,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 21:20:32,545 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash -66547302, now seen corresponding path program 241 times [2021-06-05 21:20:32,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:32,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967334228] [2021-06-05 21:20:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:32,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:32,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967334228] [2021-06-05 21:20:32,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967334228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:32,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454523586] [2021-06-05 21:20:32,773 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 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 21:20:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:32,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:33,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454523586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:33,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:20:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592365122] [2021-06-05 21:20:33,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:20:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:20:33,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:33,188 INFO L87 Difference]: Start difference. First operand 107215 states and 229036 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:34,506 INFO L93 Difference]: Finished difference Result 107853 states and 230430 transitions. [2021-06-05 21:20:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:20:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:34,659 INFO L225 Difference]: With dead ends: 107853 [2021-06-05 21:20:34,659 INFO L226 Difference]: Without dead ends: 107836 [2021-06-05 21:20:34,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 866.5ms TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:20:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107836 states. [2021-06-05 21:20:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107836 to 107611. [2021-06-05 21:20:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107611 states, 107610 states have (on average 2.137031874361119) internal successors, (229966), 107610 states have internal predecessors, (229966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107611 states to 107611 states and 229966 transitions. [2021-06-05 21:20:36,573 INFO L78 Accepts]: Start accepts. Automaton has 107611 states and 229966 transitions. Word has length 50 [2021-06-05 21:20:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:36,573 INFO L482 AbstractCegarLoop]: Abstraction has 107611 states and 229966 transitions. [2021-06-05 21:20:36,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 107611 states and 229966 transitions. [2021-06-05 21:20:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:36,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:36,650 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:36,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 21:20:36,851 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash -352438574, now seen corresponding path program 242 times [2021-06-05 21:20:36,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:36,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678628904] [2021-06-05 21:20:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:37,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678628904] [2021-06-05 21:20:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678628904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279454511] [2021-06-05 21:20:37,128 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 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 21:20:37,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:37,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:37,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279454511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:37,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:20:37,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945440268] [2021-06-05 21:20:37,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:20:37,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:37,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:20:37,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:37,556 INFO L87 Difference]: Start difference. First operand 107611 states and 229966 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,789 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-06-05 21:20:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:39,274 INFO L93 Difference]: Finished difference Result 108290 states and 231449 transitions. [2021-06-05 21:20:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:20:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:39,414 INFO L225 Difference]: With dead ends: 108290 [2021-06-05 21:20:39,415 INFO L226 Difference]: Without dead ends: 108273 [2021-06-05 21:20:39,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1287.7ms TimeCoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:20:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108273 states. [2021-06-05 21:20:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108273 to 108019. [2021-06-05 21:20:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108019 states, 108018 states have (on average 2.137847395804403) internal successors, (230926), 108018 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108019 states to 108019 states and 230926 transitions. [2021-06-05 21:20:41,005 INFO L78 Accepts]: Start accepts. Automaton has 108019 states and 230926 transitions. Word has length 50 [2021-06-05 21:20:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:41,005 INFO L482 AbstractCegarLoop]: Abstraction has 108019 states and 230926 transitions. [2021-06-05 21:20:41,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 108019 states and 230926 transitions. [2021-06-05 21:20:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:41,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:41,078 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:41,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:41,280 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash 164977818, now seen corresponding path program 243 times [2021-06-05 21:20:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640785330] [2021-06-05 21:20:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:41,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640785330] [2021-06-05 21:20:41,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640785330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899382026] [2021-06-05 21:20:41,902 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 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 21:20:41,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:20:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:41,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899382026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:42,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:42,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-06-05 21:20:42,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543010998] [2021-06-05 21:20:42,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 21:20:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 21:20:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:20:42,623 INFO L87 Difference]: Start difference. First operand 108019 states and 230926 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:45,158 INFO L93 Difference]: Finished difference Result 115704 states and 247454 transitions. [2021-06-05 21:20:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 21:20:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:45,312 INFO L225 Difference]: With dead ends: 115704 [2021-06-05 21:20:45,312 INFO L226 Difference]: Without dead ends: 115670 [2021-06-05 21:20:45,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1963.4ms TimeCoverageRelationStatistics Valid=253, Invalid=4169, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 21:20:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115670 states. [2021-06-05 21:20:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115670 to 109731. [2021-06-05 21:20:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109731 states, 109730 states have (on average 2.1420668914608583) internal successors, (235049), 109730 states have internal predecessors, (235049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109731 states to 109731 states and 235049 transitions. [2021-06-05 21:20:46,873 INFO L78 Accepts]: Start accepts. Automaton has 109731 states and 235049 transitions. Word has length 50 [2021-06-05 21:20:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:46,873 INFO L482 AbstractCegarLoop]: Abstraction has 109731 states and 235049 transitions. [2021-06-05 21:20:46,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 109731 states and 235049 transitions. [2021-06-05 21:20:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:46,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:46,946 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 21:20:47,149 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 912083922, now seen corresponding path program 244 times [2021-06-05 21:20:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597457191] [2021-06-05 21:20:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:47,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597457191] [2021-06-05 21:20:47,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597457191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69322292] [2021-06-05 21:20:47,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:47,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:48,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69322292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:48,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:48,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:20:48,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651795160] [2021-06-05 21:20:48,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:20:48,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:48,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:20:48,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:48,327 INFO L87 Difference]: Start difference. First operand 109731 states and 235049 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:49,871 INFO L93 Difference]: Finished difference Result 110422 states and 236578 transitions. [2021-06-05 21:20:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:20:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:50,013 INFO L225 Difference]: With dead ends: 110422 [2021-06-05 21:20:50,013 INFO L226 Difference]: Without dead ends: 110405 [2021-06-05 21:20:50,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1090.9ms TimeCoverageRelationStatistics Valid=162, Invalid=2288, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:20:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110405 states. [2021-06-05 21:20:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110405 to 110151. [2021-06-05 21:20:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110151 states, 110150 states have (on average 2.1429051293690424) internal successors, (236041), 110150 states have internal predecessors, (236041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110151 states to 110151 states and 236041 transitions. [2021-06-05 21:20:51,924 INFO L78 Accepts]: Start accepts. Automaton has 110151 states and 236041 transitions. Word has length 50 [2021-06-05 21:20:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:51,924 INFO L482 AbstractCegarLoop]: Abstraction has 110151 states and 236041 transitions. [2021-06-05 21:20:51,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 110151 states and 236041 transitions. [2021-06-05 21:20:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:51,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:51,999 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:52,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 21:20:52,204 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2010539930, now seen corresponding path program 245 times [2021-06-05 21:20:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:52,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455159792] [2021-06-05 21:20:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:52,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455159792] [2021-06-05 21:20:52,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455159792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:52,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284885723] [2021-06-05 21:20:52,432 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 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 21:20:52,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:20:52,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:52,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:52,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284885723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:52,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:52,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:20:52,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790916574] [2021-06-05 21:20:52,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:20:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:20:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:52,857 INFO L87 Difference]: Start difference. First operand 110151 states and 236041 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:54,953 INFO L93 Difference]: Finished difference Result 117657 states and 252327 transitions. [2021-06-05 21:20:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:20:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:20:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:55,110 INFO L225 Difference]: With dead ends: 117657 [2021-06-05 21:20:55,110 INFO L226 Difference]: Without dead ends: 117623 [2021-06-05 21:20:55,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1112.6ms TimeCoverageRelationStatistics Valid=195, Invalid=2775, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:20:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117623 states. [2021-06-05 21:20:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117623 to 111752. [2021-06-05 21:20:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111752 states, 111751 states have (on average 2.1464774364435217) internal successors, (239871), 111751 states have internal predecessors, (239871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111752 states to 111752 states and 239871 transitions. [2021-06-05 21:20:57,170 INFO L78 Accepts]: Start accepts. Automaton has 111752 states and 239871 transitions. Word has length 50 [2021-06-05 21:20:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:57,171 INFO L482 AbstractCegarLoop]: Abstraction has 111752 states and 239871 transitions. [2021-06-05 21:20:57,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 111752 states and 239871 transitions. [2021-06-05 21:20:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:20:57,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:57,262 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:57,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 21:20:57,481 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash 195460306, now seen corresponding path program 246 times [2021-06-05 21:20:57,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:57,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375067164] [2021-06-05 21:20:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:57,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375067164] [2021-06-05 21:20:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375067164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554964028] [2021-06-05 21:20:57,773 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 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 21:20:57,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:20:57,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:20:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:58,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554964028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:58,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:58,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-06-05 21:20:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28020884] [2021-06-05 21:20:58,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 21:20:58,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:58,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 21:20:58,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:20:58,466 INFO L87 Difference]: Start difference. First operand 111752 states and 239871 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:00,629 INFO L93 Difference]: Finished difference Result 120630 states and 259055 transitions. [2021-06-05 21:21:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 21:21:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:00,786 INFO L225 Difference]: With dead ends: 120630 [2021-06-05 21:21:00,786 INFO L226 Difference]: Without dead ends: 120596 [2021-06-05 21:21:00,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1509.4ms TimeCoverageRelationStatistics Valid=223, Invalid=3437, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:21:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120596 states. [2021-06-05 21:21:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120596 to 113950. [2021-06-05 21:21:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113950 states, 113949 states have (on average 2.1507692037665973) internal successors, (245078), 113949 states have internal predecessors, (245078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113950 states to 113950 states and 245078 transitions. [2021-06-05 21:21:02,880 INFO L78 Accepts]: Start accepts. Automaton has 113950 states and 245078 transitions. Word has length 50 [2021-06-05 21:21:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:02,880 INFO L482 AbstractCegarLoop]: Abstraction has 113950 states and 245078 transitions. [2021-06-05 21:21:02,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 113950 states and 245078 transitions. [2021-06-05 21:21:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:02,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:02,954 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:03,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 21:21:03,155 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1043189094, now seen corresponding path program 247 times [2021-06-05 21:21:03,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:03,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657100014] [2021-06-05 21:21:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:03,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:03,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657100014] [2021-06-05 21:21:03,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657100014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:03,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407845672] [2021-06-05 21:21:03,392 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 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 21:21:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:03,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407845672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:03,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:03,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-06-05 21:21:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056752732] [2021-06-05 21:21:03,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:21:03,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:03,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:21:03,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:21:03,860 INFO L87 Difference]: Start difference. First operand 113950 states and 245078 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:05,215 INFO L93 Difference]: Finished difference Result 115039 states and 247462 transitions. [2021-06-05 21:21:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:21:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:05,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:05,646 INFO L225 Difference]: With dead ends: 115039 [2021-06-05 21:21:05,647 INFO L226 Difference]: Without dead ends: 115005 [2021-06-05 21:21:05,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:21:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-06-05 21:21:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 114768. [2021-06-05 21:21:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114768 states, 114767 states have (on average 2.151498252982129) internal successors, (246921), 114767 states have internal predecessors, (246921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114768 states to 114768 states and 246921 transitions. [2021-06-05 21:21:07,171 INFO L78 Accepts]: Start accepts. Automaton has 114768 states and 246921 transitions. Word has length 50 [2021-06-05 21:21:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:07,171 INFO L482 AbstractCegarLoop]: Abstraction has 114768 states and 246921 transitions. [2021-06-05 21:21:07,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 114768 states and 246921 transitions. [2021-06-05 21:21:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:07,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:07,248 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:07,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 21:21:07,449 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash -640708142, now seen corresponding path program 248 times [2021-06-05 21:21:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:07,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553406829] [2021-06-05 21:21:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:07,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:07,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553406829] [2021-06-05 21:21:07,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553406829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:07,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672767951] [2021-06-05 21:21:07,671 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 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 21:21:07,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:08,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672767951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:08,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:08,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-06-05 21:21:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360083568] [2021-06-05 21:21:08,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 21:21:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 21:21:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:21:08,161 INFO L87 Difference]: Start difference. First operand 114768 states and 246921 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:09,930 INFO L93 Difference]: Finished difference Result 115616 states and 248739 transitions. [2021-06-05 21:21:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:21:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:10,081 INFO L225 Difference]: With dead ends: 115616 [2021-06-05 21:21:10,081 INFO L226 Difference]: Without dead ends: 115582 [2021-06-05 21:21:10,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:21:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115582 states. [2021-06-05 21:21:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115582 to 115351. [2021-06-05 21:21:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115351 states, 115350 states have (on average 2.1517728651928913) internal successors, (248207), 115350 states have internal predecessors, (248207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115351 states to 115351 states and 248207 transitions. [2021-06-05 21:21:12,096 INFO L78 Accepts]: Start accepts. Automaton has 115351 states and 248207 transitions. Word has length 50 [2021-06-05 21:21:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:12,096 INFO L482 AbstractCegarLoop]: Abstraction has 115351 states and 248207 transitions. [2021-06-05 21:21:12,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 115351 states and 248207 transitions. [2021-06-05 21:21:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:12,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:12,160 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:12,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:12,360 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:12,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1320600166, now seen corresponding path program 249 times [2021-06-05 21:21:12,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:12,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028234170] [2021-06-05 21:21:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:12,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028234170] [2021-06-05 21:21:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028234170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2692775] [2021-06-05 21:21:12,583 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 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 21:21:12,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:21:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2692775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:13,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 21:21:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892858519] [2021-06-05 21:21:13,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 21:21:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 21:21:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:21:13,088 INFO L87 Difference]: Start difference. First operand 115351 states and 248207 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:15,457 INFO L93 Difference]: Finished difference Result 136195 states and 294292 transitions. [2021-06-05 21:21:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:21:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:15,638 INFO L225 Difference]: With dead ends: 136195 [2021-06-05 21:21:15,638 INFO L226 Difference]: Without dead ends: 136126 [2021-06-05 21:21:15,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1159.2ms TimeCoverageRelationStatistics Valid=193, Invalid=2999, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:21:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136126 states. [2021-06-05 21:21:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136126 to 125194. [2021-06-05 21:21:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125194 states, 125193 states have (on average 2.1685877005902885) internal successors, (271492), 125193 states have internal predecessors, (271492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125194 states to 125194 states and 271492 transitions. [2021-06-05 21:21:17,790 INFO L78 Accepts]: Start accepts. Automaton has 125194 states and 271492 transitions. Word has length 50 [2021-06-05 21:21:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:17,790 INFO L482 AbstractCegarLoop]: Abstraction has 125194 states and 271492 transitions. [2021-06-05 21:21:17,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 125194 states and 271492 transitions. [2021-06-05 21:21:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:17,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:17,864 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:18,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:18,064 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 559087360, now seen corresponding path program 250 times [2021-06-05 21:21:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:18,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590416234] [2021-06-05 21:21:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:18,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590416234] [2021-06-05 21:21:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590416234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994555303] [2021-06-05 21:21:18,292 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 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 21:21:18,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:18,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994555303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:18,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:21:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375913586] [2021-06-05 21:21:18,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:21:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:21:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:21:18,705 INFO L87 Difference]: Start difference. First operand 125194 states and 271492 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:20,675 INFO L93 Difference]: Finished difference Result 130599 states and 283149 transitions. [2021-06-05 21:21:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:21:20,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:20,848 INFO L225 Difference]: With dead ends: 130599 [2021-06-05 21:21:20,848 INFO L226 Difference]: Without dead ends: 130582 [2021-06-05 21:21:20,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1068.2ms TimeCoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:21:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130582 states. [2021-06-05 21:21:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130582 to 126179. [2021-06-05 21:21:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126179 states, 126178 states have (on average 2.170592337808493) internal successors, (273881), 126178 states have internal predecessors, (273881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126179 states to 126179 states and 273881 transitions. [2021-06-05 21:21:23,031 INFO L78 Accepts]: Start accepts. Automaton has 126179 states and 273881 transitions. Word has length 50 [2021-06-05 21:21:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:23,031 INFO L482 AbstractCegarLoop]: Abstraction has 126179 states and 273881 transitions. [2021-06-05 21:21:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 126179 states and 273881 transitions. [2021-06-05 21:21:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:23,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:23,098 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:23,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:23,298 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1445126806, now seen corresponding path program 251 times [2021-06-05 21:21:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:23,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509520018] [2021-06-05 21:21:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:23,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509520018] [2021-06-05 21:21:23,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509520018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087441060] [2021-06-05 21:21:23,525 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 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 21:21:23,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:21:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:23,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:23,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087441060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:23,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:21:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541185248] [2021-06-05 21:21:23,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:21:23,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:21:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:21:23,939 INFO L87 Difference]: Start difference. First operand 126179 states and 273881 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:25,722 INFO L93 Difference]: Finished difference Result 126824 states and 275317 transitions. [2021-06-05 21:21:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:21:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:25,878 INFO L225 Difference]: With dead ends: 126824 [2021-06-05 21:21:25,878 INFO L226 Difference]: Without dead ends: 126807 [2021-06-05 21:21:25,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 985.7ms TimeCoverageRelationStatistics Valid=163, Invalid=2287, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:21:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126807 states. [2021-06-05 21:21:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126807 to 126611. [2021-06-05 21:21:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126611 states, 126610 states have (on average 2.1712423979148565) internal successors, (274901), 126610 states have internal predecessors, (274901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126611 states to 126611 states and 274901 transitions. [2021-06-05 21:21:28,151 INFO L78 Accepts]: Start accepts. Automaton has 126611 states and 274901 transitions. Word has length 50 [2021-06-05 21:21:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:28,151 INFO L482 AbstractCegarLoop]: Abstraction has 126611 states and 274901 transitions. [2021-06-05 21:21:28,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 126611 states and 274901 transitions. [2021-06-05 21:21:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:28,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:28,220 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:28,425 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2030022784, now seen corresponding path program 252 times [2021-06-05 21:21:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842770059] [2021-06-05 21:21:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842770059] [2021-06-05 21:21:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842770059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57250679] [2021-06-05 21:21:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:28,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:21:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57250679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:29,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:29,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 21:21:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468217697] [2021-06-05 21:21:29,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 21:21:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:29,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 21:21:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:21:29,200 INFO L87 Difference]: Start difference. First operand 126611 states and 274901 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:32,446 INFO L93 Difference]: Finished difference Result 139988 states and 303796 transitions. [2021-06-05 21:21:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 21:21:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:32,622 INFO L225 Difference]: With dead ends: 139988 [2021-06-05 21:21:32,622 INFO L226 Difference]: Without dead ends: 139954 [2021-06-05 21:21:32,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1372.3ms TimeCoverageRelationStatistics Valid=223, Invalid=3683, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:21:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139954 states. [2021-06-05 21:21:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139954 to 129400. [2021-06-05 21:21:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129400 states, 129399 states have (on average 2.17611418944505) internal successors, (281587), 129399 states have internal predecessors, (281587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129400 states to 129400 states and 281587 transitions. [2021-06-05 21:21:34,710 INFO L78 Accepts]: Start accepts. Automaton has 129400 states and 281587 transitions. Word has length 50 [2021-06-05 21:21:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:34,710 INFO L482 AbstractCegarLoop]: Abstraction has 129400 states and 281587 transitions. [2021-06-05 21:21:34,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 129400 states and 281587 transitions. [2021-06-05 21:21:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:21:34,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:34,790 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:34,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 21:21:34,990 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -738291156, now seen corresponding path program 253 times [2021-06-05 21:21:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:34,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320172776] [2021-06-05 21:21:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:35,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320172776] [2021-06-05 21:21:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320172776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074410802] [2021-06-05 21:21:35,221 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 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 21:21:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:21:35,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074410802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:35,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:35,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 21:21:35,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954312261] [2021-06-05 21:21:35,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:21:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:21:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:21:35,638 INFO L87 Difference]: Start difference. First operand 129400 states and 281587 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:36,571 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-06-05 21:21:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:37,443 INFO L93 Difference]: Finished difference Result 130019 states and 282944 transitions. [2021-06-05 21:21:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:21:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:21:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:37,618 INFO L225 Difference]: With dead ends: 130019 [2021-06-05 21:21:37,618 INFO L226 Difference]: Without dead ends: 130002 [2021-06-05 21:21:37,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1254.7ms TimeCoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:21:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130002 states. Received shutdown request... [2021-06-05 21:21:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130002 to 129792. [2021-06-05 21:21:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129792 states, 129791 states have (on average 2.176645530121503) internal successors, (282509), 129791 states have internal predecessors, (282509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:39,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 21:21:39,780 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:21:39,782 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:21:39,783 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:21:39,784 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:21:39 BasicIcfg [2021-06-05 21:21:39,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:21:39,784 INFO L168 Benchmark]: Toolchain (without parser) took 725146.36 ms. Allocated memory was 333.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 314.0 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 21:21:39,784 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 315.1 MB in the beginning and 315.0 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:21:39,784 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 312.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 21:21:39,784 INFO L168 Benchmark]: Boogie Preprocessor took 16.88 ms. Allocated memory is still 333.4 MB. Free memory was 312.5 MB in the beginning and 311.5 MB in the end (delta: 945.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:21:39,784 INFO L168 Benchmark]: RCFGBuilder took 269.57 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 300.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 21:21:39,785 INFO L168 Benchmark]: TraceAbstraction took 724827.99 ms. Allocated memory was 333.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 300.3 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 21:21:39,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 315.1 MB in the beginning and 315.0 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 312.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.88 ms. Allocated memory is still 333.4 MB. Free memory was 312.5 MB in the beginning and 311.5 MB in the end (delta: 945.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 269.57 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 300.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 724827.99 ms. Allocated memory was 333.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 300.3 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: 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, 39 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 724726.6ms, OverallIterations: 267, TraceHistogramMax: 8, EmptinessCheckTime: 11243.7ms, AutomataDifference: 262048.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21838 SDtfs, 45996 SDslu, 307479 SDs, 0 SdLazy, 241501 SolverSat, 5459 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88959.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16525 GetRequests, 8197 SyntacticMatches, 528 SemanticMatches, 7800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50178 ImplicationChecksByTransitivity, 144506.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188453occurred in iteration=223, InterpolantAutomatonStates: 6529, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 285786.6ms AutomataMinimizationTime, 267 MinimizatonAttempts, 548969 StatesRemovedByMinimization, 266 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 817.4ms SsaConstructionTime, 2776.3ms SatisfiabilityAnalysisTime, 102300.6ms InterpolantComputationTime, 21122 NumberOfCodeBlocks, 21102 NumberOfCodeBlocksAsserted, 1207 NumberOfCheckSat, 20591 ConstructedInterpolants, 0 QuantifiedInterpolants, 234247 SizeOfPredicates, 1062 NumberOfNonLiveVariables, 19506 ConjunctsInSsa, 5451 ConjunctsInUnsatCore, 531 InterpolantComputations, 3 PerfectInterpolantSequences, 4167/25969 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